I totally agree that you need to "Hit the Reset Button" immediately and start completely over, like today is the day you first brought her into your home. If this behavior of biting and being territorial over your kitchen started 18 months ago, then basically without knowing it or meaning to, you've been reinforcing these behaviors in her all this time, so that makes getting rid of the unwanted behaviors all the more difficult. So again, you need to start completely over, "Hit the Reset Button", and act like today is the first day you've brought her home.
It's very important that you keep in-mind that birds do not at all respond to "punishments" or "negative-reinforcement", and this will only serve to make the behaviors worse and add other unwanted behaviors as well. Birds respond only to Positive-Reinforcement, in other words you need to let her know and make it very obvious when she does good/wanted behaviors, and when she does unwanted behaviors, such as biting, that you totally ignore her...I suggest using the "Shunning Method" immediately every single time she bites from this point forward. It works better than any other method of stopping biting that I've seen, but it will only work if everyone in the house commits to doing it every single time she bites anyone. If there are only two people living in your home full-time, then this is easier to control.
The first day of using the "Shunning Method" is the hardest, because you end-up doing it over and over and over again during that first day; the flip-side to this is that they usually get the point during the first day or two, so it's a method that typically works quickly, which is seemingly what you're looking for. Again, if this means that you have to do it 10 times in a row the first day, then that's what you have to do. It works.
There are two general rules about parrots that make the Shunning-Method successful. The first is that parrots HATE being on the floor because they are the lowest thing in the room, and it strips them of any feeling of "dominance" at all, which incidentally is usually the reason that parrots like to be on top of people's heads and shoulders, because it gives them "dominance" over the person...So the Shunning Method" takes that dominance away when the bird displays an unwanted behavior...The second thing it does is it takes away the one thing that all parrots want, and that's attention and acknowledgment...And this is exactly why yelling at a bird or making a big deal about it when they do something wrong doesn't work, because you are actually giving them attention when they do something wrong, and even if it's negative attention, it's attention none the less...The fact that your bird is already clipped will also help with doing the Shunning-Method because she can't fly away into another room. She's stuck on the floor, and that makes it all the more successful.
***The Shunning-Method is very easy and basic to do, it's just a matter of doing it each and every time your Daisy bites...So here's how it goes...Whenever Daisy bites anyone, the person that she bites immediately says "No Bites!" out-loud, this is the Verbal-Directive, and each unwanted behavior that you used the Shunning-Method for needs to have a different Verbal-Directive, because parrots are very intelligent and they understand the difference in words, so she will associate the word "Bites" with biting. It's important that you don't yell "No Bites!" at Daisy, but rather just say it firmly to her. So Daisy bites someone, that person immediately says "No Bites!" and then immediately sets Daisy down on the floor right where the bite happened. If you are sitting down when Daisy bites you then you need to immediately say "No Bites!" and then stand-up and put Daisy right down on the floor...Then once Daisy is on the floor, everyone who is present in the room needs to stand-up and literally "turn their backs" to Daisy....And I mean that very literally, you all turn your backs to face Daisy. And then the clock starts...For 5 minutes Daisy needs to not only be completely ignored in every way by every person in the room, like she doesn't exist, but everyone must have their backs facing her...Any shorter than 5 minutes and the effect isn't strong enough, any longer than 5 minutes and it loses it's effect...
During the 5-minute Shunning-Period, Daisy must be totally ignored in every way. If Daisy makes any sounds at all they are totally ignored. If Daisy climbs up someones pant-leg, that person needs to immediately put her right back down on the floor without saying a single word and without making eye-contact with her, and then their back needs to be immediately turned to her again. If Daisy climbs up onto her cage-top or a piece of furniture, the person closest to her needs to again put her right back down on the floor without saying a word and without making eye-contact with her, and then again turn their backs to her. She needs to know that she is having her dominance purposely and forcibly stripped from her by being forced to stay on the floor and be the lowest thing in the room, and the backs being turned to her is a very symbolic gesture that says to Daisy "You are invisible and your existence will not be acknowledged when you do this".
At the end of the 5-minutes it's important that you don't just go and pick Daisy up or start talking to her immediately. Instead, at the end of the 5 minutes, everyone participating just needs to go about their business like it never happened, and leave Daisy standing on the floor wherever she is, and let her come to you. Sometimes they will just go back to their cages, sometimes they will walk right over to someone. If she does that's fine, but let her come to you. And don't make a big fuss over her, if she wants to sit on you that's fine, but pretend like it never happened and just act normally.
Often the bird will immediately bite again right after a Shunning-Period...If this happens, you must do it all over again...Say "No Bites!", put her right back on the floor and turn your backs to her again for another 5-minutes...This can be very frustrating for the people involved, but this usually only goes on for the first day, and not for long. I've seen this stop birds who were habitual biters in one day. Usually they go "Oh, I get it!" after 5 or 6 Shunning-Periods....So if you can make it through the first day or two of doing it, you should see improvements pretty directly...But you have to remember to keep doing it when she sporadically does bite someone. It must be done every single time she does a behavior in order for it to stick. But it will stick.