Quick answer

Free space without deleting important projects by cleaning package cache, old downloads, and temporary build files carefully.

Clean Cache is meant for quick troubleshooting from an Android phone, especially when the terminal output is confusing.

For Clean Cache, focus on files, paths, storage and backups and use the output to decide the next small fix instead of reinstalling everything.

What to check

Do not fix Clean Cache by guessing; copy the command and keep the first useful output line.
For Clean Cache, keywords that usually matter are: Clean, Cache.
If the first command for Clean Cache gives a different error, follow the new clue instead of forcing this guide.

For Clean Cache, replace placeholders only when they appear in the command.

df -h
du -h -d 1 ~ | sort -h
apt clean
rm -rf ~/.cache/pip

df -h — shows storage usage so you know whether the device is full for Clean Cache.
du -h -d 1 ~ | sort -h — shows storage usage so you know whether the device is full for Clean Cache.
apt clean — checks the part of the files, paths, storage and backups workflow that usually causes this issue for Clean Cache.
rm -rf ~/.cache/pip — checks the part of the files, paths, storage and backups workflow that usually causes this issue for Clean Cache.

Keep screenshots or copied terminal text for Clean Cache; they make paid help faster if you need it.
Save the Clean Cache output before editing files.
Change one thing at a time while testing Clean Cache.

Running the Clean Cache command from the home folder when the project is somewhere else.
Following a desktop Linux answer that ignores Android storage paths while fixing Clean Cache.
Closing Termux before copying the output that explains Clean Cache.

If clean cache the file path still does not make sense, send a screenshot of pwd, ls, and the error through the Store.