I ran out of wiper fluid a little while ago and refilled the reservoir. Ever since then when I try to use it the fluid will spray out at full strength for maybe a second at the most and then just trickle out. If I try to immediatly use it again it will still just trickle out but if I leave it for a little while it will do the 1 second spray again.
There doesn't seem to be any obvious blockages in the nozzle and I can hear the pump.
Any ideas what could be wrong? Is the pump broken?