Before spending money on the kits, try using toothpaste. It does work, some turn out better than others, but there is nothing to lose by giving it a shot. All you do is put some toothpaste on a dry rag and rub it in the surface of the lens, try to go with the grain of any patterns in the lens, then use water to rinse. Repeat the procedure if needed. Follow up with any good yellow carnauba wax. There are a lot of you tube videos for the toothpaste treatment. I tried it on my Dakota, it did help a lot but YMMV.