M.S.
Grin and bear it and stick it out.
My guess is (like my son), potty training was interesting while she was learning, and it made her feel like a big girl. Now that she's got it down pat, it is boring, and she is much too busy doing other things to stop and go potty.
Two suggestions. One, buy both fun character panties and boring white panties. Tell her that the princesses, or fairies, or whatever don't like to be peed on, so she'll have to wear the plain white ones only until she can be sure to not pee in them. Give her incentive to make sure she stays dry. Also, set a continuing timer for every 45 minutes or 60 minutes and make her go potty every time the timer goes off whether she needs to or not. When my son complains that he doesn't need to go, I ask him "Did you wet your pants before?" he says yes and I reply "then it is my turn to decide when you have to go potty". He complies, and is so excited when he actually goes because he didn't think he had to.
Frequently, I will catch my son doing the potty wiggle and ask if he needs to go potty. He tells me no, both because he hasn't acknowledged it to himself yet, and because he doesn't want to stop playing. I tell him I can hear his pee. I pretend to listen hard and then tell him they want to come out. I tell him to run to the bathroom before they decide to come out in his undies. He thinks this is a fun game and almost believes I can hear his pee talk.
Whatever you do, just get creative and make it fun again.