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.