I like to wipe the lip of the bottom section where the top part rides, with some wax paper from time to time... it protects the grinder from sticking together if you have a particularly dense sticky strain..
I also keep a tiny instrument brush handy to clean off the screen... you'd be surprised how much kief hides in the lil nooks and crannies
And if I'm trying to collect kief in the bottom section, I never tip the damn thing over.. like everyone likes to do!
Cool lookin creepy crawly on top
Edit: and I always put the buds around the sides of the grinding chamber, It gets gummy if you fill the middle up where a magnet usually goes
I am a heavy smoker and I smoke 15 to 20 joints a day so grinding and rolling supplies are a big deal to me.
The grinders that everyone seems to love (standard metal toothed grinders) are way too small for me. Even the big ones are only good for a couple joints. I usually grind a 1/4 oz at a time. Maybe a little less.
I can't find anything electric that works. And, with my arthritis, grinding herb by hand is a pain.
I found one thing that works well. It's not electric but it's cheap and it works great. Probably not fine enough for your Volcano use. But, just perfect for rolling joints.