PROBLEM FIXED:).... there is a very easy solution once i worked it out:)...on some cars, on the wiper jets hose line they have a valve in them which just looks like a connector but its actually a valve, it has a small ball bearing inside it which doesnt let water through untill there is enough pressure from the motor to move the ball bearing into the middle of the valve therefore letting the water through, i got mine off a HR31 half cut that i got at home (for my project in the process:)) which has them inline, all i did was cut the hose in the sprayer system and put it inline and problem fixed... if u put the valve as close to the jets as possibe it is better cause that way the water will always be right at the valve ready to go through the jets immediantly instead of travelling all the way from the bottle..
Thats the way i fixed mine anyway, hope it all made sense, all i can suggest is try a wreckers for these valve, they will have an arrow on the to tell you with way the water flows and u can see the ball bearing if u look inside,
So i guess people want the write up now on how to do it??