Ibuki just arrived yesterday, but I finally plugged it in this evening. Everything is simple, unscrew the bottom cover, take plastic off filter re-position cover. Instructions are very easy to follow. I detached the cover to diffuser, but I have long nails. This took several attempts to re-attach cover after I added a few drops of scented oil. It’s been on now 2 hours, smells and works with very low fan noise, not noticeable.