We have been experiencing some heavy rain recently after a long dry period. Windscreen wipers are commonly overlooked as a safety item as most of us (Me included sometimes) just learn to deal with the wipers not clearing the screen fully.
These can be very dangerous times whee peering through the screen. Most of the times the windscreen wipers make things worse and we end up squinting through.
Below is a illustration to show the few signs that your wipers are worn or past their best. They are cheap and will give you that little bit more confidence when you are driving in the wet.