No offense to anyone, but IMO, anyone who finds the need to save resin for "desperate times" has a problem. Weed is nice, but if you are "desperate" for it, perhaps you shouldn't be smoking in the first place.
And to answer the question, I don't smoke much anymore, but when I used to do a lot more drugs I cleaned my bong (small glass one) often. Just for fun. I have a metal bowl so I don't give a crap about cleaning it except to keep it from getting clogged.