Momar Chemicals 02 9831 2994 supply a concentrated deoderisor & bacteriacide. Super fragrance lasts forever. Not cheap but very good. Use very sparingly in rooms , just a puff toward the curtain or the air condtioner grill. We also use Blue Thunder for cleaning out smells & blockages in drains / toilets ect. Severe, very severe blockages use Mo-Flo sulphuric acid base instant drain cleaner. 8-Alive maintains bacteria in drains. All these from Momar. Milestone is our major supplier of chemicals but I find Momar has some very specific use products.