Why is my WiFi So Slow?
By Ken Hollow, the only IT support tech whose help tickets come written in riddles and moonlight
It started, as most catastrophes do, with Nana screaming from the other room.
“KEN. The enchantment stream is DYING. My viewers can see PIXELS. I look like a CURSED MOSAIC.”
She was, of course, referring to her livestream buffering. In the room furthest from the router. Behind two walls and a decorative velvet curtain she insists “improves the energy flow.” Meanwhile, I was sitting three feet from the router with a perfectly fine connection, wondering if this is what a hostage negotiation feels like.
If you’ve ever asked yourself “why is my WiFi so slow?” — congratulations, you’ve joined the most popular tech question on the internet. The answer is almost never one single thing. It’s usually a combination of factors, most of which are fixable without calling your ISP or throwing your router out a window.
Let’s walk through the real causes, in order of how likely they are to be your problem.
Slow WiFi is usually caused by router placement, too many connected devices, network congestion, outdated equipment, or interference from walls and other electronics. The fix depends on the cause — but most of them are things you can sort out yourself in under 30 minutes.
1. Your Router Is in the Wrong Spot
This is the number one cause of slow WiFi and the one people underestimate the most. WiFi signals travel outward from your router in all directions, weakening as they pass through walls, floors, furniture, and — in Nana’s case — a hand-embroidered tapestry depicting the fall of a fictional kingdom.
If your router is shoved in a corner, tucked inside a closet, or sitting on the floor behind your TV stand, it’s fighting physics before it even starts. Every wall it passes through reduces the signal. Metal objects, mirrors, and appliances are even worse.
The fix: Place your router in a central, elevated, open location. Think “middle of the house, on a shelf, nothing blocking it.” If your internet comes in through a wall on one side of the house, that’s inconvenient, but a longer ethernet cable to reposition the router is a cheap fix that makes a massive difference.
“I offered to place the router on my velvet altar for ‘optimal spiritual elevation.’ Ken said no. Ken is why the WiFi suffers.”
2. Too Many Devices Are Connected
Every device on your network shares the same bandwidth — your phone, your laptop, your smart TV, your partner’s tablet, the smart fridge you never asked for, and that IoT light bulb that definitely doesn’t need internet but here we are.
The average household now has somewhere between 15 and 25 connected devices. That number has roughly doubled since 2019. Your router from five years ago was not designed for this. When too many devices compete for bandwidth at the same time, everything slows down — especially activities that need a lot of data, like video calls, streaming, and gaming.
The fix: Check how many devices are connected to your network (your router’s admin page or app will show this). Disconnect anything you’re not using. If you’re consistently hitting the limit, a more modern router with better device management — or a mesh system — is the real solution.
3. You’re on the Wrong WiFi Band
Most modern routers broadcast on two frequencies: 2.4 GHz and 5 GHz. They sound like boring numbers, but the difference matters a lot.
The 2.4 GHz band has a longer range but slower speeds and is more crowded — every router in your building is probably on it, plus microwaves, baby monitors, Bluetooth devices, and cordless phones all share that frequency. The 5 GHz band is faster and less congested, but the signal doesn’t travel as far and struggles more with walls.
If your device is connected to the 2.4 GHz band when you’re sitting right next to the router, you’re leaving speed on the table. If you’re far from the router and on 5 GHz, you might barely have a signal at all.
The fix: For devices close to the router (TVs, desktops, gaming consoles), connect to the 5 GHz network. For devices further away, 2.4 GHz is more reliable. Many routers show these as two separate networks — one might have “5G” in the name (which has nothing to do with mobile 5G, confusingly).
4. Your Router Is Outdated
WiFi standards have improved significantly over the past few years. If your router is more than four or five years old, it probably supports WiFi 5 (802.11ac) at best. Current routers support WiFi 6 or WiFi 6E, which handle more devices, faster speeds, and better performance in crowded environments.
It’s not just about raw speed — newer routers are better at managing multiple connections simultaneously. A WiFi 5 router with 20 devices will choke far sooner than a WiFi 6 router with the same load.
Also worth checking: if you’re renting a router from your ISP, it’s almost certainly outdated. ISP-provided routers are typically older models with inferior WiFi technology. Buying your own router is usually a better investment within the first year.
The fix: If your router is over 4-5 years old, upgrading to a WiFi 6 router will likely be the single biggest speed improvement you can make. For larger homes, a mesh WiFi system (where multiple units work together to blanket your home in signal) solves both the range and the capacity problem.
“Ken suggested we ‘upgrade the router.’ I suggested we ‘upgrade Ken.’ The router was cheaper.”
5. Network Congestion (Peak Hours)
If your internet is consistently slow at certain times — say, evenings between 7 and 10 PM — it’s probably not your equipment. It’s congestion on your ISP’s network.
Most residential internet connections share bandwidth with your neighbors at the infrastructure level. During peak usage hours, when everyone on your street is streaming, gaming, and video-calling simultaneously, the available bandwidth per household decreases. This is especially noticeable on cable internet connections.
The fix: Not a lot you can do about this one besides switching to a fiber connection (if available), which doesn’t suffer from the same shared-bandwidth congestion. You can also run a speed test at different times of day to confirm the pattern. If your speeds during off-peak hours match what you’re paying for but drop significantly in the evening, congestion is the culprit — and you might want to call your ISP about it.
6. Background Apps Are Eating Your Bandwidth
This is the invisible one. Your devices are doing things behind the scenes that you never asked for — cloud backups uploading gigabytes of photos, Windows downloading a 4GB update, your phone syncing every app in the background, a forgotten browser tab auto-playing video.
Individually, these are small. Together, they can saturate your connection and make everything else feel sluggish.
The fix: On Windows, open Task Manager (Ctrl + Shift + Esc) and check the Network column to see what’s using bandwidth. On Mac, use Activity Monitor. On your phone, check which apps have background data access in Settings and disable it for anything non-essential. Schedule large downloads and updates for times when you’re not actively using the network.
7. Interference From Other Electronics
WiFi signals, especially on the 2.4 GHz band, are vulnerable to interference from other devices that operate on the same frequency. The most common offenders are microwaves (yes, really — they operate at 2.45 GHz), baby monitors, cordless phones, Bluetooth speakers, and neighboring WiFi networks.
If your WiFi drops every time someone heats up leftovers, you’ve found your problem.
The fix: Move your router away from microwaves and other electronics. Switch to the 5 GHz band for devices that support it (it’s far less prone to interference). If you’re in a dense apartment building with dozens of competing networks, use a WiFi analyzer app to find the least congested channel and manually set your router to use it — channels 1, 6, and 11 are the only non-overlapping options on 2.4 GHz.
“Ken says the microwave interferes with the WiFi. I say the microwave is jealous of my streaming numbers. We have different theories.”
Quick Diagnostic Checklist
Before you start replacing hardware or calling your ISP, run through this quick checklist to narrow down the problem:
| Check This | What It Tells You |
|---|---|
| Run a speed test (fast.com or speedtest.net) | Shows your actual speed vs. what you’re paying for. If it’s way under, something’s wrong. |
| Test wired vs. wireless — plug a laptop directly into the router with an ethernet cable | If wired is fast but WiFi is slow, the problem is your wireless setup, not your internet connection. |
| Test in different rooms | If WiFi is fast near the router but slow elsewhere, it’s a range or interference issue. |
| Test at different times of day | If it’s slow only in the evening, it’s likely ISP congestion. |
| Restart your router (unplug for 30 seconds, plug back in) | Clears temporary memory and refreshes the connection. Fixes more problems than it should. |
| Check connected devices on your router’s admin page | Shows exactly how many devices are using your network — you’ll probably be surprised. |
When to Actually Call Your ISP
If you’ve tried all of the above and your speeds are still significantly below what you’re paying for — especially on a wired connection — it’s time to contact your internet provider. There might be a problem with the line coming into your home, an issue at the local exchange, or your plan might genuinely not be enough for your usage.
Before you call, have your speed test results ready (both wired and wireless, at different times of day). This saves you from the inevitable “have you tried turning it off and on again” loop and gets you to someone who can actually help faster.
TL;DR
Slow WiFi is rarely one thing. Start with the basics: move your router to a central, open location. Check how many devices are connected. Make sure you’re on the right WiFi band. If your router is over five years old, upgrade it. Check for background apps eating bandwidth. And if it’s only slow in the evening, that’s probably your ISP’s congestion, not your fault.
The good news? Most WiFi problems are fixable in under half an hour without spending any money. The rest are fixable with a better router.
“After reading this, I moved my streaming setup three feet closer to the router. My enchantment stream now runs flawlessly. I have not thanked Ken. I will not be thanking Ken.”
Hi. I’m Ken. I run Two Second Solutions, a one-man agency that somehow landed a fox spirit influencer as a client. I drink too much coffee, blog when I need to vent, and regularly update my résumé just in case she sets the office on fire again. I’m not crying — it’s just spell residue.