The heating grate in our bathroom is the kind that leans against a wall, the base of it lays against white ceramic tile and is about 2" away from the wall. It's permanently attached there, it's not screwed in. There's a ton of dust inside of it, showing through the wide slits in the grate, and really noticeable against the white floor. How do I clean this dust out? The edging tool on my vacuum is too wide to fit through the slits on the grate. A drinking straw fits through the grates, but my vacuum is pretty powerful, sucks it up through the hose. Does anybody have any ideas how to clean this out?