Hello Emma, may I suggest something ?
I use a tiny little program for SAFELY deleting temporary files in one click.
The program is called Clearprog and it can be obtained here: http://www.clearprog.de

It’s German but also has an English interface and is really easy to use. You can choose what you want to clean and save the configuration.

I recommend it for quickly cleaning tempfiles.

Maybe you want to give it a try.

Bye, Fast.