I sprayed wd40 in mine for first week.. with no luck I move to one from store, penetrating oil for week 2.. literally every few hours ill spray the screw. By third week, I bought this free all off amazon. Every day i spray it at least once and on days Im home, ill spray it 4-5 times.
https://www.amazon.com/gp/product/B00022VY74/
Gave up after third week.. just cut it off since I have a replacement electrical motor side.