I would toss it. I recommend one like this, where the “plates” come out so it’s super easy to wash.
https://www.amazon.com/DECKER-Nonstick-Reversible-Stainless-G48TD/dp/B000063XH7/ref=asc_df_B000063XH7/?tag=hyprod-20&linkCode=df0&hvadid=167151781903&hvpos=&hvnetw=g&hvrand=8646638946880527112&hvpone=&hvptwo=&hvqmt=&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9003664&hvtargid=pla-373198563117&psc=1
This is the small hole waffle iron I will be getting.