http://www.bbc.co.uk/religion/religions/islam/worship/prayer_prep.shtml
The BBC has a very nice, warm, 'inclusive' section on Islam,and you can learn ever so much!
'Before Praying Muslims go through a routine washing ritual, cleansing themselves in preparation for prayer. The ritual washing, called Wudu, can be done in any clean place where there is water. There are special rules to allow for situations when water is not available (e.g. in a desert). Before starting Wudu you "make your intention".
RealVideo of prayer preparation (2m 51s)
On entering a mosque Muslims remove their shoes.
Before Wudu you make your intention. Then start with washing the hands as far as the wrists. You perform this 3 times.
Rinse out the mouth with water using the right hand. You perform this 3 times.
Wash the nostrils by sniffing up water and blowing it out. You perform this 3 times.
Wash the face 3 times.
Wash each arm up to the elbow. You perform this 3 times.
Wipe or rub the head with the inside of the fingers. You perform this once.
Clean the inside of the ears with the index fingers and the back of the ears with the thumbs. You perform this once.
Wipe the back of the neck. You perform this once.
Wash the feet up to the ankles. You perform this 3 times.'
In pre-internet days, I recall coming across an English translation of an article on personal hygiene by Ayatollah Khomeini. It addresses such questions as how many times to shake it after taking a leak. I wish I could find a link — it's got to be online somewhere!