Originally Posted by
miriam
My DH used force on my Singer 500 - it is now my donor machine - use caution - the liquid wrench should do the job if you got it in the right places and let it set. For my machines, I do not use Liquid Wrench - it can harm the finish Tri-flow works just fine.
One of the sellers that I've dealt with lately has been in the business almost as long as I've been alive (wait - when did I turn 50?! I can't be 50 yet, can I? What, last year? Nooooo!) and he says using a hair dryer gently is the best method he's found for freeing up frozen sewing machines. Caution - don't do this if you've already used something seriously flammable like Liquid Wrench!! Or at least wait until the most volatile of the distillates have evaporated on their own.