The Mister Car Wash located on Fairview in Boise is centrally located and great to stop in to get a quick car wash or a more thorough interior/exterior clean.
Getting their basic wash is reasonably priced and usually pretty quick. The attendants are pleasant and knowledgeable about all of the services they provide and can help determine which service is best for you.
Waiting inside for the vehicle to be cleaned works out well. The waiting area is clean, snacks can be purchased, and there are areas to sit and read.