Here's a trick I've never thought of. According to this tip from a self-proclaimed insider, companies that make cleaning products sometimes get you to use more of their products by increasing the size of the cap used for measuring. Watch out for this when using laundry detergent or dishwasher soap that says, use one capful as the measurement. A slightly larger cap is hard to detect and will cause you to use the product more quickly. Although I can't vouch for the veracity of this claim, you can always save yourself money by using less than the recommended amount. And if you're in for some fun, track the size of the cap and let us know if you see any changes.