I have ambarked upon the project of scanning my family's immense collection of slides and negatives. My family had a photography business in the 50's and 60's. I also have the negatives from my Grandmother's old Brownie or some such camera from the 20's. (Hundreds of them) I got am amazing scanner last week and its incredibly simple to use on these, but I need to clean them safely. Some of these slides have been out in my Dad's garage for the last 20 years and are covered in dust. Some of these slides and negatives may be very historically significant to our area. Please don't suggest taking the collection to an expert....it consists of over 10,000 items and the cost would be very prohibitive. If these aren't preserved soon, they will be lost forever. Help!!!!!!!!!!!!!!!!!