Stuck wiper arms

[crudthug]

Just don't use silicone spray in a bodyshop. They will FREAK OUT!

[schotz1]

Im been installing windshields for over 20 years. I know exactly what you are talking about. I have purchased several tools for this task. My favorite is still a battery post puller. occasionally it wont work because it wont fit in deep enough and so far I have been able to rock the wiper up and down until it releases. I get scared stuff is going to break but have been lucky so far

[Thom Feeney]

Some cars with the piston hood props you can pop them off and have access to the wiper arm

[BGS]

Seems like everyone has good methods ....I`ve had good results with a shot of penetrating lube and a couple/few taps with a hammer and a punch , striking the surface area were the nut would bottom out on the arm working "around" the shaft to break the corrosion . Since the arms usually aluminum and the shaft steel there is an electrolysis that causes the problem.