When to do maintenance on a bearing?

Recently, I bought the plastic cheat code 3 weeks ago. I love it a lot, and I’ve learned a lot of stuff already and bought a bulk pack of kitty string. The only thing lately Is that the unresponsive bearing is really loud now and I’ve noticed it spins for a little less time. I also noticed that the unresponsive bearing is becoming responsive. What should I do to make it unresponsive again? Do I buy another bearing or fix the one I have now?