Not to sound like one of those people, but a bidet. It hasn't eliminated my use of toilet paper, but certainly has reduced it, while leaving a squeaky clean feeling. I miss using it while away from home nowadays.
Other things are eye masks (I have sleep quality issues) and ereaders (never moving with ten boxes of books again).
So when I first got the bidet I was using tp but it would get soaked from drying myself off. I figured if I’m going to get my hands wet may as well use soap and towel myself off, right?
So I have a towel warmer next to my toilet. It heats about 4 small towels at a time. Once I am done with my business, I clean myself with the soap and towel myself off with a warm towel (pure heaven). Afterwards, I hang the towels on the shower door so they can dry before going into the dirty clothes bin.
I spent like $700 for a 13" boox max and it's amazing. Smaller ones are functional enough for standard prose, but stuff like textbooks and programming books that have more structured formatting really take advantage of the larger pages. I can't put a single page of any of that on my older kindle oasis, but I can comfortably do a landscape two page setup with the max.
I tried having a bidet a couple times, but I ended up having issues with certain delicate skin becoming cracked and bleeding. Not sure what the cause was, but no bidet for me.
Adding water to your skin surprisingly can make it worse. Drinking water tends to help moisturize but washing removes oils and stuff from your skin which in excess can make it dry and cracked over time. If your skin is delicate enough then excessive washing may be a lower limit than you can handle with a bidet. And slathering lotion on your ass after you poop just seems to be a worse solution.