Cleaning and keeping your Glass clean might not be as easy as you'd think it is.

To keep your glass clean and stain free we recommend using distilled or bottle water only. Avoid water with high mineral content as the minerals are what stains glass.

Second, Never let your glass sit with water in it  (clean or dirty) for more than a couple days. After a few days water will have started evaporating leaving the minerals behind causing stains to appear.

Third, find the right cleaner. When cleaning flower resin you need something like Orange Chronic or Randy's Cleaner to really rub off the particles.