Am i right in thinking then that for every 4 litres of water that i put in i need to add 1 litre of screenwash? sorry for sounding thick the label seems to be foreign, but did get a nice discount.

1 part screenwash to 4 parts water, so a 5 litre washer bottle would be 4 litres water and 1 litre screenwash.

cheers, just wanted to check i was doing it right as i prefer them putting % on the bottle then pictures with foriegn writing all over the bottle.