I don't know how to say this. I'll just say: don't sweat the small stuff. You don't have more sun than we do. I don't see a problem. Change them every year before the rainy season if needed. Chevy's of the 40's blades are $3-$6 each. The upholstery and all the other rubber is getting blasted also. The paint is fading.

Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn