Self-bondage sessions that didn't go quite as planned

Tonight I planned on an evening and night of self-bondage, which was my second time attempting it before. The first time, I could reach the key to unlock myself. I pondered how to tie myself so that staying bound would be guaranteed rather than escaping too easily. After some thought, here is what I came up with: I tied my legs to the foot of the bed using two belts. One hand was tightly secured to the bedframe, while the other had enough room to move around and grab the key for the restraint system. I used a belt that featured visual holes suitable for padlocks, employing two locks in total. A combination lock near my unrestrained hand remained out of reach, while another lock attached the belt to the bed frame; this second one required a specific key to unlock. Since I allowed some movement to my free hand, I was able to unlock it once the ice holding the key had melted (the key was tied to a string that passed through a narrow slot which wouldn’t accept the key until the ice thawed). I set everything up and heard one final click. It felt exciting, though my single bound hand was quite tight and didn’t feel entirely comfortable (not a serious issue, just not ideal). After a short while, I began to struggle. I thought escape would be impossible, but with some pulling, I managed to slide my hand through the restraint. Suddenly, I could grab the key from its icy prison, bite off the remaining ice (I don’t own a ballgag and didn’t use any other device), and set myself free… The whole thing wasn’t entirely pre-planned. Next time, I need to improve on binding myself securely rather than focusing so much on the escape attempt.