While changing my clip-ons yesterday I had the hardest time dropping the forks. I loosened the upper and lower triples, but the forks didn't budge. I thought once the bolts were loose, the forks would just drop on their own. After pounding with a rubber mallet, they finally went down. Then getting them back up was equally challenging. The clamps on the triples seemed a little dry/corroded. Would this be the cause for the sticking? Would it be alright to use WD-40 to ease the slide? Any input will be greatly appreciated.