There’s a lot of debate on whether or not Bar Keepers Friend is safe to use on glass. Some people say that it’s perfectly fine to use, while others recommend avoiding it altogether. The bottom line is that BKF can be safe to use on the glass as long as you take the proper precautions. First and foremost, always test the product in a small, inconspicuous area before applying it to a larger surface. If the area turns white, then you know that the product is too harsh and shouldn’t be used on glass. Secondly, avoid using BKF on scratched or pitted glass surfaces. The abrasive properties of the cleaner can make these imperfections even worse. Finally, always rinse the surface thoroughly after applying BKF. Leaving any residue behind can cause streaks and smudges.