To maximize your savings, you can purchase a bundle of credit.
When you purchase a bundle, your card on file will be charged the amount of the bundle.
Then, we add 10% additional credit to your account.
That total credit (credit from the charge plus the additional credit) is applied to your upcoming cleanings in that account automatically, no need to do anything special.
Up to 90 days after purchasing a bundle, you can be refunded the bundle amount, less what is used and less the additional credit. This way, bundles do not create any additional obligations, and you should never pay more for a cleaning after buying a bundle than you would otherwise pay.
For example, if you bought a $500 bundle, you would have $550 in credit added to your account. If you used $100 in credit, then wanted a refund, you would be refunded $400.