I have a wet dry vac I use exclusively for drywall dust. I half fill the bottom of the holding tank with water and then vacuum. The water will collect most of the dust, but it still plays havoc with the filter after a couple of pounds of dust is cleaned up. A guy I know puts water in his vac and also wraps the filter once with painter's tack cloth. He replaces the cloth as necessary. He swears by it, but of course the tack cloth has a price tag.
Measure [B]Twice[/B], Cut [B]Once[/B]! 'Cause the lumber stretcher is broken!
[COLOR="Green"][B]Think [/B][/COLOR]before you throw it away! If you can't use it, maybe someone else can!