Not only can you clean a chillum without isopropyl alcohol, we actually recommend you use a special cleaner instead. Isopropyl alcohol is a fire risk, and if you fail to thoroughly rinse and air-dry your chillum, you risk causing a huge fire. We recommend Formula 420 for cleaning glass or silicone chillum pipes since it provides a very thorough clean and is much safer to use for cleaning. You can find Formula 420 at various online retailers, including here at vapevetstore.com!