Originally Posted by Cactuscooler
3. No maintenance is needed on the sight’s surface, except to occasionally wipe off with a soft cloth. Use only a water-based cleaner such as glass cleaner, ammonia, or soap and water. Never use any solvent-type cleaner such as alcohol or acetone. "
Don't use a solvent-type cleaner such as alcohol or acetone, but ammonia is OK? Doesn't seem quite right to me. I'd stick to an actual automotive glass cleaner (no alcohol, ammonia, etc.) or some warm water with a bit of distilled white vinegar.