Human: What is the best type of abrasive to use to clean my bathtub? Assistant: 
The best type of abrasive to use to clean your bathtub is a non-abrasive scrubbing pad. Non-abrasive scrubbing pads are designed to be safe for both your tub and your skin, as they do not scratch or damage surfaces. They also provide an effective way to remove soap scum and other built up dirt from your bathtub.