i know its been discussed before but how do you disconnect the washer fluid for the back window?
 
There are two hoses coming from a pump on the washer bottle.

select one of the two (i think its the one with the white connector) and pull appart from the connector that is a few inches along the tube. Put yourrear washer on and if nothing comes out, its the right one, if it does, disconnect the other one instead.

Simple :D