How can I find space eating files in my home?

commandline approach

Using the following commands, you can get a list of items in your home, sorted by size in MB:

gdu -sm ~/.??* ~/* | sort -n | less

If you replace -sm with -sk, the size will be shown in KB.

Or use ncdu.

graphical approach

Try using JDiskReport as a graphical tool. When JDiskReport get startet you can choose the directory it should scan. Here are some Screenshots as an example.