Potty Training

I've been training son around 2.5-3yrs now...

How long does it take to get them completely trained? He won't tell me and I'm getting tired of it. He doesn't mind being on the potty when I leave him on it 15-30 mins for every he to 2hr...

He currently has been getting feel for underwear in the last 2-3 weeks.

What tips do other mom's have??

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