I clean my tank and pre-made coil heads weekly. Just take them apart and soak the parts in warm water, but let the coil head soak longer to get the juice out. I then wipe all of them dry with a towel. For the coil head, I will proceed to cover the airholes and blow into the top to get all the water out before air drying it together with the other parts of the tank. I usually re-prime my coil head after each cleaning.