Some 1 piece wipers..(as mentioned) do not contact the windshield properly. Just how they can say..and install them on your car when they are completely unsafe.Some retailers quietly take them back no questions.(Because they have heard they are a safety concern. Duh).
Windshield angle. Aerodynamics. Any wiper..old..worn out..no rubber,,no frame haha etc works fine on pre 97 GM Full size vans.
There really is not a good wiper for Focus Wagons.Except for the rubber boot types below..but good luck finding one!
The older kind of winter wipers with the rubber boots..
These are a lot of nos.Not always available.If you buy these in southern Ontario..good chance that the rubber is rotted.
They may last only a few minutes..then the rubber cracks and lets in whatever to freeze solid leaving you with no wipers.I buy several pairs of them for my vehicles when I can. They are the best. Do not expect them to last any more than about 3 months.I have bought different kinds of them at different places. I used to buy these and they would last a few years! The last few pairs I bought were just so crappy that even when new..and with good rubber..the metal in the hinges binds under some temperature/humidity conditions and you will only forget to bend them/flex them/crack the ice once..leaving you with no wipers. From then on you will do that every time you drive first thing..and the odd other time too.
Sometimes with new winter..rubber boot types..they are good..then a short time later the boots crack..crap gets in and of course freezes..then you get to try and strip off the rubber..and get the crap out..and flex them
With bare hands.