You can’t clear your inventory, I meant to sleep without anything in inventory. However, I can’t lose the screwdriver or anything when I sleep (I even slept multiple times just like you said).
Did you lose the screwdriver after you converted it? If yes, that message from the converter was normal because all converter items send the same message after converting (like the oven or waters).
I say that you download the game again (to have the new patch) and try again, I’m sure you’ll like the ending :>
Your easter egg idea is very good! I might put it in next update…