I use Formula 420 and man it works amazing. I put some in my glass bubbler with a little scalding hot water and just shake it around. My buddy watched me use it and said “I wouldn’t have believed it had I not seen it!” in regards to how easy and perfectly clean it was in 5 mins.
You cans also use salt water. Well super salt water that is. Just water wit lots of salt in it. The salt acts as an abrasive and breaks down the resin build up as you shake it around. Makes glass sparkle. Also you can reuse it a couple times. Just pour it into a storage bottle after cleaning and use it 4 or 5 times more before making more. My buddy in the falls uses this method to clean his bong and it really works. Just rinse out the bong afterwards to get rid of the salt and enjoy your freshly cleaned glassware. An it doesn’t take long at all.
Also for my small pipe I usually just run them under really hot fu×&in water. I don’t really have hot cold sensation in my hands so I can do it. Just let the hot water run through until it’s clean. Might have to use a q-tip to get some out, but I can usually get it all out with just letting the water run through it.
Yeah, that doesn’t really make “fresh” though. Mine pipe is hard to get into. I’ve wrapped it in a paper towel and nuked it for like 20 seconds and the crap pretty much just ran out.