Your Google Pixel 9 uses cached data to make apps load faster, but that temporary storage can get cluttered over time. If you're noticing apps stuttering, storage filling up, or just general sluggishness, clearing out that cache is a great first step. It's a safe process that won't delete your personal data or log you out of accounts.
Clear an Individual App's Cache
This is the most precise way to target a problematic app. Head to Settings > Apps and select the app that's acting up. Tap on Storage & cache and then hit the Clear cache button.
This only removes temporary files the app has stored. Your login info, saved preferences, and downloaded content within the app will stay right where they are. I'd start with apps like Chrome, Instagram, YouTube, or any large games, as they tend to build up the biggest caches.
Use the System-Wide Cache Cleaner
Android 15 on the Pixel 9 includes a handy feature to clear cached data for every app at once. Go to Settings > Storage and look at the breakdown. You should see an entry labeled Cached data showing how much space it's using.
Tap on Cached data and confirm when prompted. This is a quick way to free up a gigabyte or more in a few seconds, and it can help if multiple apps are feeling slow.
Clear Your Chrome Browser Cache
Since Chrome is the default browser, its cache can get particularly large. Open Chrome, tap the three-dot menu, and go to Settings > Privacy and security > Clear browsing data.
Make sure Cached images and files is checked. You can choose a time range, but "All time" gives you the cleanest slate. Tap Clear data to finish. Your saved passwords and bookmarks won't be affected.
Wipe the System Cache Partition
If your Pixel 9 is lagging or glitching, especially after a system update or Feature Drop, clearing the system cache can help. First, power the phone off completely. Press and hold the Power button and Volume Down button together until the bootloader screen appears.
Use the volume buttons to highlight Recovery mode and press the power button to select it. When you see the Android robot with an exclamation mark, press and hold Power, then tap Volume Up. Navigate with the volume keys to Wipe cache partition and select it with the power button. This process is safe and doesn't touch your photos or apps.
Manage Files with Google's Built-In Tool
The Pixel 9 comes with the Files app pre-installed. Open it and tap the Clean tab at the bottom. The app will scan for junk files, large duplicates, unused apps, and screenshots you can safely delete.
It's a very intuitive way to see exactly what's hogging space. You can review its suggestions before deleting anything, which gives you full control over what gets removed.
Review Messages and Downloads
Don't forget about the storage used by old text threads full of photos and videos. Open your Messages app and clean out lengthy conversations. Also, check your Downloads folder by opening the Files app, old PDFs, APK files, and other items you grabbed once can linger there for ages.
Perform a Simple Restart
Sometimes, the quickest fix is the best one. A restart clears out the phone's active memory (RAM) and flushes temporary system caches. Just hold the Power button until the menu appears and tap Restart.
Making this a weekly habit can prevent minor software hiccups from building up into bigger performance issues on your Pixel.
Check Detailed Storage Breakdown
For a full picture, go to Settings > Storage. Here, you'll see a detailed chart of what's using space. Tap into categories like Apps, Images, and Videos to see the largest files.
This is also where you can manage photos backed up to Google Photos. If you have Backup enabled, you can use the "Free up space" option within the Google Photos app to safely remove local copies that are already secure in the cloud.
