You used WD40? Be sure you clean it all out of there and replace it with Triflow oil for metal on metal areas and Triflow grease for gears. If you can't find Triflow, use sewing machine oil and Singer lubricant (in a small tube), which you can get at any sewing store. WD40 is NOT a lubricant and will cause problems over time. The same goes for 3 in 1 oil and anything except sewing machine oil. Use cotton swabs to clean it out. Do not make things worse by using some other cleaner.
I'm not sure if I want to ask about the degreaser. Too bad I didn't see this thread earlier.
I'm not claiming to be perfect or to know everything, but I am a certified sewing machine mechanic. I work on many different machines. I would never use what you did. Sorry!