cleaning light fixture glass

[Nano]

I've always just used water and a sponge, its tricky to get it all off, but I think the trick is to clean it, let it dry, clean the sponge or towel, use clean water/vinegar, repeat as necessary. even with my FW tank with no salt, I still get build up of sorts, and its tough to get it perfect

[Aquattro]

Agreed on the acid. Well diluted, well ventilated, well protected and neutralize after use with baking soda.