My stability cushion is a plastic/vinyl/rubber model with a series of little stubs on one side. It’s gotten really dusty, so how do I clean it?
It’s hard to reach all the nooks and crannies of these models. Think of it as trying to floss a whole mouth of tiny teeth. Because it’s plastic/vinyl/rubber, you could hose it down with water to dislodge the dust. It should get rid of most of it. If it’s still not coming out, you might need to immerse it in water and go over it with detergent and a clean bristle brush.