As per post, I'm getting a very sporadic washer fluid level warning on the dash (and the check light which is annoying)! This happens intermittently and it doesn't matter how much is in the bottle

Tonight I took the sensor out as I'm lucky to have a F/L mig and as soon as you open the bonnet you can see it. The thing was covered in a green algae type gunge, so I promptly cleaned it up well and re fitted the sensor ... Now it's worse than ever

I'm guessing that the sensor is buggered but I thought I would ask for other opinions to confirm my suspicions before just going and getting a new one!
After being told about the no screenwash thing being a very bad idea I immediately went on the search for something suitable. Now I use Prestone All Season Screen Wash

This stuff is amazing, it has something in it that repels the rain water on the screen so even when driving in rain that would usually require wipers on speed 1 you can comfortably get away with intermittent! Only down side is that there isn't really a smell to it as such so a bit boring on that front