Those who think streams of water clean their arses are fooling themselves. Unless you are using fire-hose power streams that would ream your anus to an unpleasant and medically dubious depth, squirting water just makes a ****** situation even shittier.
Anyone who uses a bidet -- and I have tried all types and sizes -- and then follows that stream with a right proper warm towel or wet wipe will immediately see what's left: the brown stains don't lie.
The proper procedure is TP to remove gross materials, followed by warm towels and/or wet wipes. I use all 3 because I'm anal that way.
I would never use a bidet and call it good. I would not even use a bidet as part of my 3 step cleaning process. They are messy and ineffective, though if you are the type who likes an arse tickle/fiddle/massage you might like it.
I'm guessing all the bidet guys in this thread wear tightie whities and have major skid marks because they don't use bleach.