cleaning tush during colonoscopy prep

My tushy doesn't like the tush wipes. I'm usually ok w baby wipes but then too wet and have to dry. Instead of the chemicals in the wipes and extra irritation for the multiple hemorrhoids, can I just hop in shower and use handheld shower thingie for a quick rinse and then pat dry?

Also, can I use lidocaine numbing cream that I use for electrolysis and other skin procedures. I've used on tush when the hemorrhoids act up, major helper!

You can use non-alcohol baby wipes, then it doesn't irritate the skin, you can do sitz bathes too, and instead of actually wiping, you can dab with TP since it's watery D coming out from prepping, it doesn't usually leave a whole lot of mess to "wipe", I had no issues when I did my last prep...have another coming up in August (YUCK)