My granddaughter took a "break" for a couple of months after we thought she was totally onboard with using the toilet. She went back to using the toilet 100%...she just needed to assert her independence for a while.
Something that helped alot was BabyLegs...these are cute little leg warmers that she wore under her dresses to keep her legs warm. It made it so easy for her to go potty by herself. She did not have to bother with pants or tights (or even undies most of the time). I just found a coupon code called MayDay...you get $12 off if you order $24...it's like a pair free. I ordered twice, so I got two free pair. You can use it at babylegs.net...I might order again.