Vinegar has the very real potential of causing damage to your grout. Note that if your grout is sealed, then you are safe. Unfortunately, however, vinegar can most definitely penetrate grout that is unsealed and it does so by getting into the air spaces that are within the material. Once ...
Countertop tilecan be ceramic, porcelain or granite. They are all set in adhesive over a base of plywood and cementboard. Glazed tiles have a shiny appearance and usually don't require sealing. Some grout should be sealed to prevent discoloring. Consult the tile manufacturer for recommendations ...