I re-read my post and see where I wasn't clear. I ended up removing and discarding the plastics. Then I cleaned the dies with GOO-GONE because it had all that adhesive stuff on the dies. I put the GOO-GONE on the die and let it dissolve the adhesive a bit and then just wiped the dies GENTLY with a paper towel. Then I washed off the GOO-GONE.
I'm rather new to MFT dies and so I am not sure what the warranty covers. Jody told me it is okay to remove the plastics. Please check with MFT to see what the warranty covers.