While he still wears them sometimes the child cannot finally learn that every feeling of bladder fullness means a trip to the potty. With many children, urine training will go smoothly from this point on. You will get fewer and fewer accidents until you suddenly realize that you have stopped taking mopping up for granted as one of your daily tasks. You want him to feel that pants are more comfortable than diapers and that using a potty is quicker and easier than being changed. If you keep nagging, you will make him feel that life was easier when he had those safe old diapers on and that being put into pants has spoiled it all.
Reminders ruin training anyway.
You are trying to help him recognize his own need to go and do something about it for himself. If you keep reminding him, you are doing his thinking for him. You may actually delay the moment when he is fully and independently reliable. Don't expect a toddler to be able to urinate without feeling the need. You are the one who wanted the child to stop wetting himself.