
Hamsters are escape artists. Never underestimate the intelligence of rodents. Before I changed the lid, there were a few times when my family will wake me up at 6 am, yelling to me, "I saw your hamster running in the living room!". It really scared me silly cuz I was afraid they ran out the door. There was one time Yuu ran out and I couldn't find it for 2 days. I thought it escaped already but found it 2 days later trying to climb on the table to get to the tank.

I think it got hungry. Lucky it didn't escape.

Kept checking the tank for holes but could't find any. Found them pushing the lid a few days after that. I never would have believed it if I didn't see it myself.
Then I took out the wheel to DIY a new lid for them.

Feel like wanna pengsan when I saw them climb the plastic block house. It wasn't tall enough to aid their escape.

Then I saw Fat Fat step on Yuu and started jumping jumping to reach the lid.

Had to remove every tall structure in their tank to prevent their escape until their new lid was done.
I also experience many times my hamster escaped and gone for 14 hours. There was one time where I left the lid open and my hamster ran away and closed after it escaped and later when I come back I was shock to find it missing completely.