Hi all, 
I'm aware that it can be problematic but mine really is pathetic. 
The headlight wash is foamy and enthusiastic, I know because it covers the front of the car and beyond. 
  
The window washers are useless, as per the picture below (this is in full flow). I get pathetic flow and no foam. 
  
  
 
 
  
I've checked the non-return valve and replaced it just in case. It made no difference. 
  
Any advice? 
  
Thanks, 
Bagz