Cleaning Carboys

Sand. Thow some sand in there with the cleaner and shake well. Also letting the carboy sit for a day full of bleach water might do it.

Bob

Steve Sauch> I have a few carboys that over the years have some lime or film residue

If bleach wouldn't remove the residue, try some hydrochloric (muriatic) acid. Just don't mix it with any other chlorine-containing chemicals to avoid release of free chlorine. HCl is the main ingredient in scale removing products for bathroom (porcelain, glass) surfaces and it works well. Get it from building supply store in tile/grout area, pool supply store, etc. Neutralize with baking soda, keep it out of your eyes and off your skin when concentrated.

Cal

Make a strong solution of "Pink Stuff".....enough to fill the carboy and leave it over night. It should do the trick. If you have a yellow "sediment" in the morning then you know it has done the job.

Steve Sauch> I have a few carboys that over the years have some lime or film residue