I hope this helps, if you have any problems send me a message and I will email to you, I used to use a damp cloth and rotate the rollers to clean, after say 5 shots. I would try to get rid of the wd40 as it will contaminate the solutions and plastic.
A Guide to Using Polaroid 4 x 5 Sheet Films
File Format: PDF/Adobe Acrobat - Quick View
in the instructions originally packed with the Polaroid. Model 545 film holder. Please consult those instructions when first learning to use the film holder.