Tip for grip when stretching

I have seen various ideas for maintaining grip when stretching. The two I have personally tried are toilet paper and talcum powder, but I found these abrasive and irritating to the skin of my penis. I found a way to keep a good grip that works for me, and maybe it’ll work for others.

Take a shower. That’s it. It can be a full shower if you want certainly, but I just wash my lower area. I find that once the sweat and oils are gone, my grip is completely non slip.