A really basic question, I searched but could'nt find where it had been discussed before. I recently joined the digital age, and discovered the wonders of digital photo editing. I bought a DiMage Scan Dual IV to scan in some of my photo collection which goes back to the 60's. I discovered that my slides, even though archived in plastic sleeves, had acquired dust and it affects the scanned image. So what now? Air in a can?