Carplan Screenwash Concentrate 5L

I would not recommend this product. Once mixed a black bacterial growth develops over time which can block a car's screen washer system. It was a major problem to flush out the system on my car. It is definitely this product which causes the problem as I have used the same product for several years now. The problem can be recreated by leaving mixed solution in one of the supplied 5L containers for a few weeks. The black bacteria forms every time. There may also be a health risk.