Went away on Friday afternoon. Was the last person to use the loo and the bathroom bin at home. Came back Sunday later afternoon, DD goes to wee then asks have I had any gum (as in I had some and didn't share). I said no, why. She says there is some gum in the bathroom bin. I said it must have been one of the sitters we had that week. She says the last one never chews and the one before just wraps it in the little paper and takes it home. I roll my eyes and go to have a look at the bin. Indeed there are two pieces of chewed gum, smelling quite strongly, on top of the panty liner back paper that I put in the bin last Friday.
I think it odd but there must be a sensible explanation. We do not chew gum almost ever so must have been the sitters. It's all a bit funny so I text the one from Thursday saying - silly question, etc. blah blah, did you leave the gum in the bathroom bin. Answer: no. So I ask the other one - nope.
Right so then I'm starting to panic slightly. The panty liner was the last thing I put in the bin, underneath was a petrol receipt from Thursday night - I must have put it there after the babysitter went home. So the receipt, my pantyliner and then the two pieces of gum.
Also the timer for the water heater was pushed in when I went to turn it on. I had checked twice that everything was off before we went away: all the radiators, the cooker, the bathroom heated rail, the water heater - ran my fingers around the dial that the "teeth"(?) were not pushed in. If this happened on its own I would have thought that I had already mindlessly went to the cupboard and turned the water on and then tried to do it again but I don't think so??
Also the water was so hot when I opened the tap - it wouldn't be so hot after 2,5 days of no heating and me turning it on 40 minutes earlier or so. It was as hot as if it was on once per day. I can stress enough how I am sure the timer was off before we left 
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What I'm asking - do I just assume it a non-event or would you be worried. Change the locks? Would insurance cover it? 101 would be an overreaction (just to log it and say I kept the gum)? I know I nor DD put that gum there .
Name changed as I had to ask the managing agents if they sent anyone here plus the sitters obviously know the story.