Why would my Oil filter cap melt? on 2007 Honda Civic Si

I went to change my oil in my 2007 Honda Civic Si and when I took off the oil cap the inner ring of cap was melted? Does anyone have any clue why? has anyone experienced this before? Is it major

Asked by for the 2007 Honda Civic Si
1 answer
Could it have previously fallen down and sat on the exhaust manifold during a previous oil change not done by you.