Can I use Windex on quartzite?

Don’t use Windex on quartzite — the ammonia breaks down your sealer over time. One spray won’t ruin anything, but daily use strips the protective layer that keeps stains out. Once that’s compromised, liquids soak into the stone instead of beading up. Stick with warm water and a few drops of dish soap for everyday wipes. For tougher messes, a pH-neutral stone cleaner like StoneTech or TriNova works without touching the seal. If you’ve been using Windex regularly, run a water bead test: pour a tablespoon on the surface and wait five minutes. If the stone darkens instead of repelling the water, you’re due for a reseal. Soap and water handles most kitchen messes just fine.