How often should I clear cache on Fire TV Stick?

Clear the cache every few weeks, or any time an app starts to feel slow. Apps you use every day build up cache the fastest.

Does clearing cache delete my apps or logins?

No. Clearing cache only removes temporary files, so your apps, settings and logins stay in place. Only "Clear data" logs you out.

Can I clear cache for all apps at once on Fire TV Stick?

No. Fire TV has no button that clears every app at once, so you clear each app in "Manage Installed Applications". A restart helps too, because it resets the stick's working memory.

Why does my Fire TV Stick keep buffering?

The most common causes are weak Wi-Fi, low storage, apps running in the background, or a busy stream server. Work through the fixes in this guide one at a time to find the cause.

Does changing DNS make Fire TV Stick faster?

Changing DNS does not raise your internet speed. It can help streams start faster and may get around throttling by your internet provider.

What buffer size is best for streaming on Fire TV Stick?

A buffer of 5,000 ms (5 seconds) is a good balance for most connections. It gives the player time to handle short speed drops without a long wait before the video starts.

Is the Fire TV Stick 4K Max better for 4K streaming?

Yes. The 4K Max has a faster processor and newer Wi-Fi than the basic stick, so it handles 4K streams more smoothly.

Amazon Fire TV Stick: Clear Cache and Speed Up Streaming 2026

To clear cache on a Fire TV Stick, open "Settings > Applications > Manage Installed Applications", pick the app, and select "Clear cache". Then restart the stick and check your network. These three steps fix most slow or stuttering streams.

What You Need

Your Fire TV Stick and its remote
A working Wi-Fi or wired internet connection
The name of the app that feels slow
About 10 minutes

How to Clear Cache on Fire TV Stick, Step by Step

Cache is a store of temporary files an app saves so it can load faster. Over time, this store grows and can slow the app down. Clearing it is safe and keeps you logged in.

Press the Home button on your remote.
Move right and open "Settings" (the gear icon).
Go to "Settings > Applications > Manage Installed Applications".
Scroll to the app that runs slow and press Select.
Choose "Force stop" to close the app fully.
Choose "Clear cache".
Repeat steps 4 to 6 for other apps you use often.
Restart the stick with "Settings > My Fire TV > Restart".

Quick tip: you can also restart by holding Select and Play/Pause together for about 5 seconds.

Clear Cache vs Clear Data vs Restart: Which One to Use

Fire TV gives you a few ways to clean things up. Each one removes a different amount. Start with the lightest fix and move down the table only if needed.

Action	What it removes	Do you lose your login?	When to use it
Clear cache	Temporary files only	No	An app is slow or stutters
Restart	Nothing saved; it resets working memory (RAM)	No	The whole stick feels slow
Clear data	All app files, settings and logins	Yes	An app crashes, or clearing cache did not help
Factory reset	Everything on the stick	Yes, for all apps	Last resort when nothing else works

"Clear data" sits right under "Clear cache" in the same app menu. Factory reset is under "Settings > My Fire TV > Reset to Factory Defaults".

More Ways to Speed Up Streaming on Fire TV Stick

A clean cache is a good start. But slow streams often have more than one cause. The fixes below work on all current Fire TV Stick models.

Check Your Storage Space

When storage is almost full, the whole stick slows down. Check it in "Settings > My Fire TV > About > Storage".

If space is low, remove apps you no longer use. Go to "Settings > Applications > Manage Installed Applications", pick the app, and choose "Uninstall".

Turn Off Autoplay and Background Data

The home screen plays video previews on its own. This uses memory and internet speed you could give to your stream.

Open "Settings > Preferences > Featured Content" and turn off "Allow Video Autoplay" and "Allow Audio Autoplay".
Open "Settings > Preferences > Privacy Settings" and turn off "Device Usage Data" and "Collect App Usage Data".
Open "Settings > Preferences > Data Monitoring" and turn it off.

Update the Fire TV Software

Updates fix bugs and can improve speed. Go to "Settings > My Fire TV > About > Check for Updates". If an update shows up, choose "Install Update" and wait for the stick to restart.

Improve Your Wi-Fi Signal

A weak signal is one of the most common causes of buffering. Buffering means the video pauses while it waits for more data.

To check your signal, go to "Settings > Network". Highlight your network and press Play/Pause to see its status.

Move the router closer to the TV, or remove walls and metal objects in between.
Connect to the 5 GHz band if your router has one. It is faster over short distances.
Use the HDMI extender cable that comes in the box. It moves the stick away from the back of the TV.
For the most stable link, use an Ethernet adapter made for Fire TV.

Change Your DNS to Cloudflare 1.1.1.1

DNS works like the internet's phone book. It turns website names into addresses. Some internet providers slow down video traffic, which is called throttling. A different DNS can help with this.

Fire TV only lets you change DNS when you set the network up by hand. First, write down your IP address and gateway from "Settings > My Fire TV > About > Network".

Go to "Settings > Network".
Highlight your Wi-Fi network and press the Menu button (three lines) to forget it.
Select the same network again and enter your Wi-Fi password.
Choose "Advanced" instead of "Connect".
Enter the IP address and gateway you wrote down. Use 24 for the network prefix length.
Set DNS 1 to 1.1.1.1 and DNS 2 to 1.0.0.1.
Select "Connect" and test a stream.

Set a Larger Buffer in Your Player App

A buffer is a small amount of video the player loads ahead of time. A bigger buffer gives the player more time to recover from short drops in speed.

A buffer of 5,000 ms (5 seconds) is a good target. Look for it in the playback or buffer settings of your player. Common players include TiviMate 5.x, IBO Player Pro, IPTV Smarters Pro, Kodi 21 and Flex IPTV. Not every player shows the setting in milliseconds, so pick the closest option.

Most live streams use HLS (HTTP Live Streaming). It sends video in small chunks, one after another. If you want the technical side, developers discuss it on Stack Overflow HLS.

If a Step Fails

"Clear cache" is greyed out: the cache is already empty. Choose "Force stop" and try the app again.
The app still stutters: use "Clear data", then log in again.
You can't find a menu item: names can change a little between models and software versions. Update the stick first, then look again.
No internet after the DNS change: forget the network and reconnect with "Connect" instead of "Advanced". This brings back automatic settings.
The remote stops working: put in new batteries. You can also control the stick with the Amazon Fire TV app on your phone.

When the Problem Is the Stream, Not the Stick

Sometimes the stick is clean and the Wi-Fi is strong, but the video still stalls. In that case, the cause is often the server that sends the stream. This is true on any streaming device, from a Fire TV Stick to a Roku.

A stable source matters as much as a fast device. SubTV IP is a paid premium streaming subscription built for this:

99.9% uptime
An anti-freeze server cluster that keeps streams running
4K at 60 fps with HEVC, a video format that keeps 4K files smaller so they load faster
Works on Fire TV Stick 4K Max, Samsung Smart TV (Tizen), LG webOS, Android TV Box, Xiaomi Mi Box S and Apple TV

Plans run for 1, 3 or 12 months, and they activate right after you order. You can pay securely with PayPal or a credit card. Help is available through WhatsApp support.

👉 Get Instant Access Now