You just need some Isoproply Alcohol to clean your pipes and bongs real good. It's not expensive, and is available at most headshops and pharmacies. It just dissolves the resin, it's great. If you don't care about saving your resin, or are too lazy to try to save it, use that alcohol crap. My wood pipe came out like new after I cleaned it, the bone one doesn't come out as clean, but it still cleans up really nice.

For bong chambers that are hard to reach, this is an ideal solution. Just add some salt in with the alcohol and shake it around in there and it should clean it. Unless you let it build up alot then it will take some more effort, but it will clean it sooner or later.

It's way better than any soap solution, and you just need to rinse it with warm water after.