RezBlock (Put a few drops in your H20 of your pipe to keep it clean)
This works very well. Just make sure you rinse it well anywhere your mouth is going to make contact with it because it tastes very nasty. It really keeps the grime off the glass so when it's time to clean it, it is not such a horrible mess. It makes your pipe very easy to clean. You may think it is pricey, but think of it as a gift for yourself. It's worth it!
I love res blocker it works so amazing. I really love the fact that I don’t have to clean my bong as often as I did before. Thank u 420 science u guys really are the best!!!!