S.O.
Don't push it. What I always did is right after they wake up in the morning and after a nap - it was habit to go sit on the toilet whether they did anything or not. It becomes a habit and they usually have to go after they wake up. If you don't want to start anything new - then I would wait for the intense training. But, this is one way you can keep up the habit - without pushing it - without regression. I would also put them on the toilet when I knew they were about to poop, or in the middle of, or just finished. Just to reinforce that the toilet is for that. No pushing - just matter of fact - this is what we do. By the time he's 3, it will just be a matter of learning control.