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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.

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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.

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