Remove scratches from tempered glass by using a glass polishing kit. The kit contains a solvent that can be applied to the glass and buffed off by hand. The solvent relaxes the glass so that small scratches can be removed, but it may not be possible to remove deeper scratches.
Once the glass has been buffed, clean it with a mixture of soap and water. A sponge can be used to rub the glass. Finish the procedure by polishing the glass with a soft cloth. Abrasive cleansers or cloths should not be used on tempered glass, because they can scratch the surface.