I clean my bong like once a month. I usually end up buying new ones every 3-5 because someone breaks one haha. Should I be cleaning them more then once a month? And when I mean clean...I use salt and rubbing alcohol. Other then that I do use warm water and soap...but a full on clean is like once a month. As for sun, I live in California, so theres plenty of that haha. Its just that my coughs are getting really violent lately and it feels like my throat is tearing and I go into five minute coughing fits which is really uncomfortable to say the least.