Here you can find a list of resources and research regarding the hygiene of bidets and traditional cleaning methods:
“[Excessive wiping].. can cause an anal injury and lead to bleeding, pain and itching”
gastroenterologist Michael Dann, MD via LiveStrong
“[Wiping incorrectly].. can increase the spread of harmful bacteria to the urethra”
board-certified internal medicine physician Sunitha Posina, MD via LiveStrong
Improper wiping can cause a multitude of long term hygienic issues.
“Using the bidet function of toilet is efficacious in maintaining hand hygiene.”
Faculty of Pharmaceutical Sciences, Shinya Kawai
“Use of bidet decreases transmission of fecal microbe to the hand”
Faculty of Pharmaceutical Sciences, Shinya Kawai