what I do is use 99% rubbing alcohol and pour some in at the herb end, then swish it between the ends, using my figures to stop it from leaking. Then getting it all to the herb end with my thumb covering it, and shake it a bit, then drain it. Do this 2-3 times and let it dry out, and you will be good.

After about a month or so you will have to remove and clean or replace the wire mesh filter.