The most important thing is that the bristles have the little rounded end on them... You definitely don't want pointy or straight bristles with no round ends bc that will hurt and take skin off, a grill brush would be more likely to end in blood and gore than tickles. 😂 ... Using oil to make the surface slick, and moving the brush back and forth fairly fast is the most effective way and the oil will help both faster movement and keeping the brush from hurting/scrubbing too hard on skin... I was surprised to turn out not very ticklish by the brush, it is more effective on some people than others.