Q:

What should I wash my walls with prior to using "peel and stick" tiles except TSP? 

I am installing peel and stick tiles as a backsplash.   I would like to know what to wash the walls with before installing.   The walls were painted eight years ago. 

A:

Borax is a great substitute for TSP.  Mixed with water, it is a very good degreaser.  Just scrub your walls with it and let it dry completely.  Any ammonia-based cleanser will also do the job.  With peel and stick tiles read and follow all the manufacturer instructions accurately. 