i don't use bidets because they are faggy and unnecessary so i don't know the actual answers to your questions. however, i maintain a pristinely clean ass by simply dampening toilet paper in the nearby private bathroom sink, which you will have unless you are shitting in public or a complete slum.  a few squares of sturdy 2-ply folded a few times or bunched up is strong enough for a single wipe pass as long as it isn't completely soaked. if your toilet paper is too fragile to hold up to your sandpaper-like ass then wet, then it's extremely likely to be leaving behind bits when dry as well. you then continue on with dry toilet paper, which may be closer to a post-bidet condition, which again should hold up perfectly fine unless you're a weirdo that does three or more wipe passes with the same piece of tp. then repeat ass needed until ass is both clean and dry. you're welcome.
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