Take a look at the freebie being promoted by Chemtronics. Get a free Can of Canned Air to keep your devices clean and dust free. The offer is promoted by Chemtronics and live right on their site, visit their order page and click on the request a sample button. After that all you need to do is fill out the popup request form with your mailing address and name. This freebie, like most others can take up to 8 weeks to arrive at your door so please be patient. All samples are only available while supplies last.