First, for regulatory purposes, we have to note that scientifically, there is no such thing as a “cleanse.” It comes down to semantics, but your liver and kidneys do the cleansing for you, and the only thing food or supplements can do is support them in those processes.
KidneyAid is a very gentle kidney support formula designed for regular use. If you wish to do a temporary intensive nutritional support regiment (TINSR) for your kidneys, you can take 2 capsules 3 times daily (up to 8 capsules maximum), for up to 30 days before taking a break for 7-10 days.
If it concerns you to take KidneyAid regularly, then you could always take periodic breaks, such as 5 days on and 2 days off, or 3 weeks on and 1 week off.