I use alcohol to clean the iClear clearos, yes. I just unscrew everything (don't tug on the wicks!) including the coil/wick part, slosh it around some alcohol, let it sit for a few and then give it a quick rinse in water. I blow out the excess moisture into a paper towel and let the parts sit overnight or until it's dry.
Careful you don't lose the clear rubber? silicone? part, it's a bear to find.