Should I do more training for the Number guessing model?

I did a project on making and training a number-guessing reinforcement learning model.

I did 140k episodes, and it started to Show degradation in success rate due to the model being made up of Standard DQN and not Double DQN . Should I train it more to see the max ceiling limit of success rate the model can achieve? What do you think, and how much should I train it until? Number Guessing RL Model