Ray.. de-ionized air. I think you can just get that at Staples. One caution on those air cans.. make certain the projector is cool. Those air cans sometimes spray cold, very cold air.. and that can blow those very hot bulbs. Just a thought. Peter Drescher Technology Integration Specialist Vermont Institutes Alumni Hall 45 College St. Montpelier, VT 05602 802-828-1381 (voice) 802-828-1327 (fax) [log in to unmask] ________________________________ From: School Information Technology Discussion [mailto:[log in to unmask]] On Behalf Of Raymond Ballou Sent: Tuesday, December 05, 2006 1:22 PM To: [log in to unmask] Subject: cleaning projector lenses Dear List: Now that we have a number of projectors in the building, I have actually started to pay attention to maintenance. We have no current issue, but I foresee a day when I need to clean a lens. Most likely from dust accumulation than from anything else. We have a number of projectors here and they all says something a bit different but it boils down to. Deionized air Lens cleaning paper Dry soft cloth (for camera lenses) Has anyone used anything else and had good luck, where does one get deionized air? R.