Just washing the car wont work.I have found this needs to be done at least 4 times a year with something that will bloat the rubber to as close to its original shape as possible and try and keep it soft and plyable.
When doing this, its best to have a garage so that you can leave the car in there for a few hours with the Tbars off and the doors open to give the rubber time to get fully plumped out.
When doing this, you may as well do all the rubbers around the doors, pillars and bonnet and boot as well.Its worth doing this just before the first frosts of winter as well otherwise your TBar will make a horrible creaking sound when driving as it flexes.
It also helps stop the door glass sticking to the Tbar rubber and door pillar rubber so you can actually get into the car.There used to be a superb product for this but they stopped making it a few years ago.
I have not found one anywhere near as good since. I am currently using a halfords rubber rejuventator but it does not plump the rubbers as well as the other stuff but it does keep the rubber plyable.If anyone uses a waterless cleaner on their car, which are ok on rubbers, dont use it on the Tbar rubber as the surface becomes so slick water will get by the door window.
I thought the cleaner the surface the better the contact and therefore seal, but it seems the contact surfaces can be too slick if less than a perfect fit - which they wont be.If you end up buying new Tbar rubbers, I have heard they are not the easiest thing to fit correctly so suggest getting it done by someone thats done it before.
