Haha 1/2 hour...your lucky you even have a part left. When dipping a part and it having direct solvent contact it just needs to be quick. Abs in acetone for example is just seconds. I would dip it and immediately pull it out and let it sit for a minor two then rinse it off. The thick liquid that the meth chl is in is designed to keep the solvent on the surface and not flash off real quick.