Hello, Lkmuller - We're sorry to see that you're having some difficulty with your power scrubber! This scrubber has a lock-on feature so that you do not have to keep holding the power button continuously while using the tool. To start the motor, simply fully depress the on/off button once and let go. This will make the brush start spinning. To stop the motor, fully depress the on/off button again, and the brush will stop spinning. We hope this helps! And please email us anytime at Reviews@RYOBItools.com if you need any further support.