What is the difference between THC petroleum and distillate? There's no strict rule about how frequently you have to clean your vape pen. How often might you clean your vape pen? in case you've vaped for awhile of course, if your reservoir doesn't keep blocking, it may be time that is enough to transition out your vape pen, in some other words wash it. Most products and solutions offered online must go through GMP certified testing for quality. Read more...