You may want to change only the rubber part or switch to those "aero" or "hybrid" blades which are more flexible.One being the genuine oldstock Saab wiper blade assy's fitted a year ago have decayed and now need to be replaced again. Fortunately 400 mm ones are easy to get from auto parts stores (Tridon brand is common here) but none seem to cope well with the extreme curvature of the front glass.
Second one being that the coolant tank is down to just under minimum.
Since the car got parked up in July last year I've had it running a handful of times and last time was a cpl of months back.
Seems to make me think there's a weep or leak somewhere, or (hopefully not) a head gasket issue. I thought I'd found and sorted all the hose connection weeps.
Anyway car has had it's first clean in about a year, so it looks a lot nicer.
Maybe the cap or the coolant tank itself has become brittle over the years.