Hi there! First-time poster here with a question I hope someone can answer. How do you clean the inside of a permanent insert like the one on my Looker 02? No matter what I do it seems to have a pungent odor to it. I've tried a jewelry cleaner, dishwasher, boiling water, all to no noticeable effect. Any ideas would be very much appreciated as this is a device I've been using for quite some time and I have no intention of stopping any time soon!