Consider using Dr. Bronner's Sal Suds. It's $10.99 for a 32 ounce bottle. It is condensed ... in the true sense of the word. You only use a teaspoon in a gallon of water. I've been using mine for months and I've hardly made a dent in it. I even made my own spray bottle mixture out of it - 1 to 1/2 teaspoon of the stuff and water. A boat-load cheaper than the $4.00 they want to charge you for something similar at Target. (Makes you realize why the companies started marketing them to us in the first place!) Dr. Bronner's is earth friendly, and cruelty-free. Plus, it won't make you feel like passing out from the fumes when you go to clean your shower! Some of that chemical stuff is nasty.