Got worse half to use the washers on my car while i checked to see if the headlights washers worked. But they didn't. Tried with lights on and off, engine on and off etc. Whilst spraying the windscreen there is a little motor whirrrr noise then nothing? Windscreen works fine. Any ideas?? I have prodded the 'robots' and they move slightly so i dont think they are stuck to the bumper?? possibly just really lazy ones??