Hi all, thanks for your replies. His eye is still not better - it's not completely shut at least, and he'll open it completely at times, but it still looks a bit swollen and he only has it half open most of the time. I will call the vet tomorrow. He doesn't seem like he's in pain or discomfort anywhere else which is good. He is running around looking pretty happy. When he next comes in I'll give it a wipe as suggested.