There is no definitive schedule that can be applied to all cars. Many factors play into how often claying is recommended for your vehicle (where your car is stored, how often you wash it, what environmental elements are in your area, etc). However, you can easily determine for yourself how often to clay by performing a simple test. Every time you wash, use Quik Detailer® or Ultimate Quik Detailer® on your vehicle, run the palm and fingertips of your clean hand across the top surfaces. If you feel a rough, bumpy surface, it is time for you to clay. Depending on the mix of factors that affect your vehicle, you could benefit from claying as often as weekly to as rarely as once a year.