Lightly blow out the ashes after each use. After 3-4 uses, you can run a pipe cleaner through it dry. The glass may start to go black after about 4-6 uses, which is normal; you can clean it with Isopropyl Alcohol.
We've shipped thousands of our products without any problems, but if you do experience an issue, take a photo of the packaging and the broken product and send it to info@sleek-usa.com">info@sleek-usa.com.