Reintroducing a Belt After Long-Term Raw Lifting

I hit a long-term goal of my mine to equal my previous record in a Zercher squat without a belt or knee wraps.
I lifted for a year or so primarily without a belt and used a spring device called a Powertwister ,similar to steel bending.

I seem to get nothing out of the belt . It is just uncomfortable. This cannot be right as I used it a lot before. What can I do to reintroduce it in order to lift more weight?

My zercher at 180kg and a month shy of my 42 birthday equals or surpasses what I did at 26 or 27 with a belt. In fact it would have crippled me without a belt. Unfortunately I am a lot heavier but I will take that. Sorry to blow my own trumpet lol.