Me and DP going over to a friend's tonight...she's cooking. I made a really nice loaf with the last of my herbs from my holiday to take with us. I had to go out but the bread was second proofing in the tin so I said to DP, I've set the beeper, when it goes off, can you turn the over on to X temperature, then when its come up to temp, pop the bread in for 32 mins and then put it on the rack to cool. He said ok. He send me a pic of it when he got it out the oven saying it smelt lovely. When I got home he goes, 'come and look at the bread it looks good'. It looked nice but on closer inspection, it had some weird blue bits on it, almost like melted wax. Turns out he baked it with the oiled cling film from the proof still on top of it. He said he know cling film shouldn't go in the oven but he "didn't notice it". I'm trying really hard not to be cross. Did I need to leave clearer instructions? Should I be worried?? AIBU?