I have a tiny kettle pressure washer that I got at a yard sale for $25. That will remove the poop and a little skin. Magnum PSI will make sure you never need to clean shit from your ass again.
I know this is a meme, but I ran into this same issue and it was due to the fact that the length of the tubing between my wall and toilet was too long. Once I got a shorter tube the pressure went up significantly.
Lemmy's biggest issue is content. At least OP is adding something to the table. You are welcome to find better quality content yourself and post it here. I would give you an upvote.