Tide Washing Machine Cleaner has been specifically designed to help remove and dissolve away odor causing residues that may build up in your washer over time ? even from those areas you can?t see! Have you ever run a load a laundry and at the end, it just doesn?t smell clean & fresh? It could be coming from residues left behind in your washer. Washers today use less water, which can leave behind residues in machine ?including areas you can?t see, e.g. back of the tub, hoses, drain, etc. These residues can lead to the build-up of malodor, which can be transferred to your laundry. Proper care for you machine, which includes running monthly clean-outs with Tide Washing Machine Cleaner to help remove these residues and keep them from causing laundry problems down the road.