When you say pressed DVD's does that mean it doesn't work with burnt media?
My kids have damaged a few of the DVDs I burnt in the past, and I'm running low on the repair fluid I've got. I think this is a mixture of alcohol & a special wax, that cleans discs & fills scratches. It's worked miracles on some discs, & failed completely on others.
In any event it sounds worth the investment, I think I'll get one next time I see one.