I use hydrogen peroxide (H2O2), a bristle brush, and boiling hot water to clean my stones. I boil em, scrub em, douse them, and then run air through em for awhile in a H2O2 solution. Micro can definitely clog em.

For getting scrum off the walls, use a water and H2O2 solution. When I did hydro, I cleaned every week. The bubble wands dont clog as easily but they seem to have larger bubbles. However they seem nice considering they wont crack or break or keep stuff inside of them.