Is it normal i'm not sure what to do in this situation?

The other day I had told my co-worker how these pans that I use at work are having all this build up on them that wasn't there before; how I felt a little irritated. He had told me that his eggs don't stick and maybe they went through the dishwasher. I told him yes maybe but it still is irritating. I wasn't angry by any means; more rationally speaking.

Every time I clean these pans when I work, there is more brown gunky build up that I can scrape off with my nails. The thing is that the more build up later on they will for sure stick more. :\

I have this real gut instinct that he isn't going to do it and that I might need to say something again. He had walked away after I had told him a little about it, I didn't finish. I didn't say any blaming statements just talked about the situation. I could tell he was frustrated at what I had said which led me to believe that he takes things too personally.

When I here people say something like that I think about it and try my best to make clear what was my perspective or just tell them I understand when it is true. Suggestions, talking about situations or even the right criticism and I truly love it in the end. I feel happy to have learned something that I didn't think about that could be a problem.

But in this situation I'm being rather indecisive if I must say something again to him if he didn't correct it or maybe say something about the pans to the managers; I'm not going to talk about him in particular just the non cleanliness.