That was probably me... Well I have gotten out of the habit of doing that. Not really sure how to stop biting though. Blueberry despises me, so she bites very hard. I don’t even have to be bothering her to bother her, so when she bites I kinda just let it go.
It's actually a rather common suggestion so can't necessarily blame anyone in specific.
This may sound rather annoying, but the best way to stop a bird from biting is to not get bit in the first place. Yes, I know! Easier said than done! You can think of it this way... the more a bird has time to practice an undesired behavior, the more ingrained it becomes to do that behavior! So, if you can figure out ways to avoid getting bitten, you can 'unteach' that behavior.
What are the bird's triggers? How can you avoid those triggers or desensitize your bird to those triggers?
How can you set your home up for success?
Bird who seems to bite unprovoked? A bird that literally goes out of their way to bite someone? Cage them! Seriously! Allowing them to continue isn't helping the situation! However, you *DO* want to work on desired behaviors while *IN* the cage.
Another common advice.... remove your bird from their cage and take them to neutral territory to train them. Make them feel vulnerable and have to rely on you. *THIS* is terrible advice! This can teach birds that hands are bad around the cage, so they become cage aggressive. You thus end up with birds that are "fine once away from the cage". This also puts birds into a "fight or flight" type of response which isn't the ideal state a mind you want to be training a bird, or any animal for that matter, in.
So.... going back to training in the cage. If you do it right, you can avoid bites. Ideally, you want the bird to be comfortable and calm as well. If the bird freaks out, then you want to make sure that the cage is fairly large and the bird has a way to escape from you and potentially hide as well. Giving them this option can teach them that they don't need to be forced to do anything. You could also set up a treat cup at the front of the cage and drop their favorite treats into this bowl to help them learn to associate that good things happen when you come near the cage. You may need to change how you approach the cage, such as walking slower, not making eye contact, etc... for the bird to remain calm. If they are fine with you approaching the cage, then you can work on target training through the cage bars. You can have them reach through the bars in order to receive a reward, you could drop the reward into a treat cup inside the cage or offer it via a spoon. If the bird goes to attack you when you try to change out the dishes, then work on station training away from the dishes.
Once the bird can reliably target to any location within the cage, you can then move on to training through the open cage door, around the outside of the cage and eventually away from the cage. This training alone can help teach your bird to go in and out of their cage with ease, go back to their cage if necessary and sets a foundation for future training. It helps to bridge a communication gap of sorts as well.