I recently purchased one from Wiggle and used it twice at the most.  Now when I use the presta side of the pump it does not seem to press the valve in to open it up.
Can anyone tell me if there should be a piece of plastic in the hole that is in the shape of a cross, like on the schrader side? Maybe this has fallen out, but I find it unlikely?
Thanks for your help in advance.
	
		
			
		
		
	
			
			Can anyone tell me if there should be a piece of plastic in the hole that is in the shape of a cross, like on the schrader side? Maybe this has fallen out, but I find it unlikely?
Thanks for your help in advance.
				
 I always unscrew the valve and press it in briefly to free it up. Then attach the hose head and 120psi = no problem at all 