My Apartment Has Gremlins

I'm pretty convinced that somewhere in my apartment there is a secret access panel to gain entry from the outside. Since I moved into my apartment about 6 months ago, random things are disappearing from my room including things that I wouldn't have any interest in moving from their normal spots. They include, but are not limited to my T4, toothpaste, cologne, soap, dvds, toilet paper, tums, clothes and lighters. Since most of the items in question were last seen in my bathroom, I decided to turn to my own detective skills to track down the culprit(s). After all, one never truly appreciates the subtle world of toiletries until he/she is without them and in need.
I started my search around the toilet area, fearing that those guilty may have gained entry using advanced special forces scuba techniques. Nothing seemed out of place except the unsightly ring around the bowl, which I quickly took care of, putting even Mr. Clean to shame. My search then turned to the bathtub. Perhaps there was an entrance of some kind? I could not locate any crease, and with a small push was unable to find an Indiana Jones-esque secret door. I was unconvinced that no such door existed as there could be a locking mechanism on the other side but moved on.
A further search of the cupboards and medicine cabinet came up empty. My patience was running thin.
After being laughed out of the building management's office (apparently they don't do gremlin fumigation), I decided that for the time being, not much else could be done. My last ditch effort was to utilize a roll of my beloved 2-ply in the middle of the bathroom floor with a string attached to see if I could catch this greasy sneak. I would not give up, believing that those guilty must be brought to justice.
I gave up the next day. Motivation does not stay in such situations. I will share my things, but next time could these bandits at least leave a note?

Happy hump day,

Blake