I live alone and swear here are no burglars, no one but I have access. A year ago I put my mobile phone in front of the pannier next to me on the bedside table, it was gone the next morning. I have already moved my apartment twice and I have not found my cell phone, it's gone. Disappeared without a trace. This morning I missed 5 T-shirts and a hoody… If someone would break in here he would have other things such as. Stolen my laptop, but who needs T-shirts? And my mobile? They can't just run away like that. What shoud that? What's this?
Carbon monoxide? Something similar has happened before. Buy a carbon monoxide tester if you often forget things or have a headache
Do you have pets? A colleague of mine kept dropping things off after setting up cameras and found out that it was their cats.
Smash your place completely after the Konmari method.
You will hold EVERY part in your hand… What comes to the fore, you believe only when you have experienced it yourself!
And when you cleared away and tidied up, you feel much better… Especially because then everything has its place!
Check out "Cleaning up with Marie Kondo" on Netflix. This is better than the famous "box sorting method", Konmari is the third edition of it!