The thing to remember about birds is, they can make the decision to not want something, just like you can! They are capable of not being in the mood for something, like a bath, and as owners we must learn to respect their wishes and not give them a bath if they don't wan tit.
Sometimes I'll give my birds (all 4 cockatiels) a bath and sometimes, 2 like it. The others will try to escape the spray bottle I sue and go as far away from me as possible. Sometimes, all 4 like it, sometimes only 1 likes it, and that's okay and normal. Remember they aren't like dogs and cats who want to cuddle and be on you all the time. Sometimes they like to sit on their cages and be left alone to preen, play or enjoy a snack. One prefers to dunk herself in her water bowl so she's never really liked baths, but it's not uncommon for birds to not want to be bathed or showered, and want to be left alone.
Keep in mind that cockatiels are birds and some birds just like their space. After bathing I usually let my cockatiels dry out by themselves and take a nice long nap.They aren't particularly cuddly after a shower and prefer to dry out on a branch and preen. Sometimes the best times for them are when they can be lefta lone on their cage and relax. This is a good thing, and won't last forever. Soon she'll be back at it wanting attention before you know it. In the meantime, give her space and respect her wishes to want to be let alone for now. It's nothing personal, just like how you want to be left alone sometimes