The yellow stuff.
You’ll end up having to clean a gross, gel-like substance out of the filter on your washer pump.
Heh, I’ve been meaning to ask about this on here for months. The washer packed in on my previous motor, took it back to the dealer and they said the screenwash had turned to jelly. Their advice was to not use the cheap crap, I was going to question that as it’s never happened to me before in 25 years of using whatever was on offer at the time. Handy to know the cause, thanks.
Umm, water and washing up lipsquid?
Perfect if you only drive in summer and don’t like glossy paintwork.