Use the right water.
Get the right equipment.
Anal douche bulb:
These have a reusable rubber bulb that you can fill up with your home made normal saline.
They are convenient but many of them have a hard plastic nozzle. Use lubricant on the nozzle for safer insertion.
Get your butt ready.
Lube it before you stick it.
You are not that kind of catcher. Don’t spray too much in.
Stick it in and do it.
Don’t douche too much.
Be reasonable – remember, poop happens!