Muhammad's Disgusting Hygiene Instructions
Muhammad Was Horribly Wrong About Personal Hygiene:
He ordered people to drink camel urine: Sahih Al-Bukhari 82:794, 796-797; Sahih Muslim 16:4131; Sunan An-Nasa'i 307 (Dar-us-Salam Reference); Musnad Ahmad 2677 (Dar-us-Salam Reference).
He incorrectly said that water is not defiled by anything, not even menstrual clothes, dead animals, or human excrement: Sunan Abu Dawud 1:66, 67; Sunan Ibn Majah 2:520.
He said that if a fly falls in your drink, to fully dip the fly into the liquid before you drink it: Sahih Al-Bukhari 54:537; Sunan Abu Dawud 3844.
He said if you drop food, remove whatever got on it and eat it: Sahih Muslim 23:5046.
He told his followers to lick their fingers or to let other people lick their fingers before they wipe their hands after they eat: Sahih Al-Bukhari 65:366; Sahih Muslim 23:5037.
He let a child suck on his tongue, and he also sucked on a child's tongue and/or lips: Al-Adab al-Mufrad al-Bukhari 48:1183 (In-Book Reference); Musnad Ahmad 16245 (I believe this is Dar-us-Salam Reference).
Muhammad Seemed Obsessed with Urine:
He said a man went to hell for defiling himself with urine/getting urine on his clothes: Sahih Muslim 2:575; Sunan Ibn Majah 2:347, 349.
He said most of the torment of the grave is because of urine: Sunan Ibn Majah 2:348.
He told people to drink camel urine: Sahih Al-Bukhari 82:794, 796-797; Sahih Muslim 16:4131.
He said a man overslept because Satan urinated in his ears: Sahih Al-Bukhari 21:245, 54:492.
He said if people keep a horse in Allah's cause motivated by their faith in Allah and belief in his promise, they will be rewarded on the day of resurrection for its dung and urine: Sahih Al-Bukhari 52:105.
He said Allah doesn't accept the prayer of anybody who urinates until the person performs the ablution: Sahih Al-Bukhari 4:137.