@D0lphinBladicted sorry I didn't reply earlier, had to see instruction pictures of the process and yeah.. that wasn't very nice to see

so there are multiple methods, some of them are the bidet/ douche already mentioned.
but you can also use the shower hose, lean the tip on the hole, and let the water pressure do the work, squirt the water out, and repeat the process until the water that comes out is clear with no color nor smell
