Pb blaster doesn't work. I've used it plenty and it does f!@k all. Kroil is used by the local gunsmith downtown. It's not cheap,but hey if it works then it's worth it!
I really did have much better results with the PB Blaster than I'd had with WD-40. I'm anxious to see how well that Kroil stuff works. I'm heading to the local NAPA to see if they've got it. I see that they want $25 for a 16.5 oz. can on eBay. - That is pricey.