95% is the highest level of purity you can obtain from distillation with ethyl alcohol (not sure about isopropyl). Calcium chloride (anhydrous) has a high affinity for water. If you add the CaCl to the 95% alcohol, it will "dry" it by absorbing the water -> 100% alcohol after filter the CaCl.
The stuff at the drug store is 91% isopropyl alcohol, 9% water and costs about $1.25. Snow melt is cheap too. Mix and filter and you have 100% isopropyl. The link above has pure alcohol for $25 for a liter!
That is if the snow melt CaCl is as pure as what we use in the lab. I have a feeling though that snow melt contains some other impurities that might royally F*#@ up your electronics after you dissolve it in the alcohol. Also the snow melt might not be anhydrous, but it should be dry enough. You might have to use a little more.
The big question is weather this would be worth it. My guess is that for the purpose of cleaning parts and drying electrical components, 90% is sufficient and the extra purity would not help enough.
But than again, we're talking about people who spend hundreds of dollars and modify expensive equipment jsut to get a couple extra Mhz out of a processor!
