ive found that offering 20% Off for the first clean for new customers is working pretty good, i have a standard price and offer it to them from a flyer and only get it with that flyer....But i also offer 20% Off if they introduce a friend ectr..... off there next clean. Try It..... You may be cutting the price by 20% first off but just think of the next clean you will be getting 20% more Back.