I get the impression that the bug just moves the dust around on a record, but does not remove it the way a handheld brush would.
Sorry to dredge up a thread so old, but this is not correct. I used a Dust Bug on my first turntable beginning in 1970, a Dual 1209. Then I went through a phase about 10 years later where I used a Discwasher handheld brush. Although the latter picks up some of the surface dust, it grinds the rest of it down into the grooves. Many of my albums were damaged and met a premature demise using this method. I abandoned it entirely and reverted to a Dust Bug when I started playing LPs again about 20 years ago.
The Dust Bug works because the "roller" brush is moistened before each use. The tracing bush up front loosens dirt laying in and on the grooves, and the dust then adheres to the roller. Note that the roller doesn't actually roll when the brush is in use. It wouldn't work properly if it did. The brush is fixed in position, but it can be rotated to a new position by hand if the bristles become worn. I never tried this system on any belt-drive turntable, so I can't comment on that. I use it now with a direct-drive Denon, and there are no ill effects. The original fluid is unavailable, so I moisten the roller with Discwasher fluid (currently using D4+). There's some irony in that, I guess.
I'll add that the Dust Bug is the
only system I've ever seen that absolutely prevents pops and crackles from forming when playing an album. And because I almost never buy used records, I never invested in a separate cleaning or vacuum system. Those are useful for an initial cleaning, but do nothing to prevent dust that settles on the record during play from creating pops. Only the Dust Bug does that.
After owning the Dual 1209 and Dust Bug for a few months, I noticed that some albums that were entirely clean during previous plays would suddenly exhibit a few pops. Cut to the chase, this turned out to be the result of sliding the vinyl in and out of the paper sleeves. I've never seen this reported by others, but perhaps that's because none of the other cleaning methods are as effective, so pops and crackles are unavoidable. Anyway, once I realized this was happening, I cut one side of all my LP sleeves with scissors. This allowed opening the sleeves and setting the album inside, instead of sliding it against all the accumulated dust and dirt. Problem solved.
The Dust Bug is indeed more work than simply swiping the disc with a brush before each play. Nevertheless, if you value your albums and want the best possible musical experience, this is the way to go.
Jack