• Try alternating toys in the cage and/or moving them to different positions in the cage. It sounds like Beanoo is cage territorial. You say "he just LOVES" his toy. If he is viewing this as a companion, he may be trying to protect it from you and that is why he could be attacking your hand now where he wasn't before.
• Try partially covering the cage as well. How big is his cage? Is there enough room for a few toys and to arrange it so that he has some place to hide in there so he'll feel safe? 
• Try moving the cage to different places and see if it helps. Some birds love it near a window where they can look outside and see what's going on. Other birds freak and like a more quiet & calm area.
• You say his cage is in the kitchen? Please be careful of fumes with him in there. Over heated teflon, cleaning agents, self cleaning ovens, smoke etc can make him ill and even kill him.
• Try  taking him away from the cage. Preferably to a small bird safe room out of sight of the cage. This will put you both in neutral territory & remove the object that he is protecting from you. He is also forced to focus more on you.
• If he won't step up off the cage to you, try using a stick to step up on until he becomes more at ease.
• Sit and read outloud to him, or sing, or hum, or just talk.... (not facing him, but at an angle or next to you.)
• Don't stare him in the eye. It's ok to look at him, but not long at one time. And try not to do it directly. This is what preditors do when they are stalking prey and 'teils will take flight if they can, fight it they can't.
• Try not to back off or jump if he lunges at you. I know this is very hard to do sometimes when a sharp beak is coming at you. If he lunges and you retreat, you are teaching him that he's a big bad bird and can chase away the threatening hand/human.
• Try to stay calm and relaxed, talk in a calm soothing voice as you would to a scared child. Birds are usually very good at reading subtle body language and tones of voice. Tense to them is a threat. Preditors are tense = ready to pounce.
• If you offer him your hand to step up to, keep your fingers curled under and your wrist bent with the hand curled towards you. This tightens the skin and makes it hard for small beaks to get a hold of any skin if he should try and bite. (this doesn't work as well with big beaks) Once he stays relaxed with your hand in the cage, try gentally playing with a little foot type toy. If he is nosy like mine, he'll want to see what it is.
• If he is afraid of hands you can also try wrapping your hand in a washcloth or tea (hand) towel. This will sometimes scare them more. You will have to watch and judge Beanoo's reaction for yourself. I have also just sat quietly by the cage with my hand in there.. not moving towards them, just letting them see I was not threatening them. If he's attacking you might not want to try this unless he calms down some.
• Sometimes a good time to try working with him is after he's been out playing on a play gym for a little while and he's a bit tired. 
• Try different foods and find out what his favorites are and once he will take it from your hand, reserve that for training sessions and use it for a reward. Keep trying different veggies and treats. Cockatiels can be wary and it might take some time to get him ti try new foods. Just keep offering.
• Try eating near his cage where he can see you. Again, not facing the cage directly, but next to it or at an angle where you can turn to him or turn away and he doesn't feel threatened. Talk to him as you eat.. (yum, this is good, Ooo and ahhh) If he's anything like my tiels, even those of mine who don't like handling will come over and look. If he does, offer him a bite. It he backs away, hold it there a minute and if he doesn't come near it, just turn away and eat it. Be persistant and he will eventually.
• Sit at his cage and look out from it at his height and look around the room. See if you can spot anything that can scare him. anything that looks even remotely preditory. Eyes staring, pictures or statues of anything. Reflective things, shadows that move etc.
• Keep training sessions where you are actively trying to get him to step up, etc fairly short. Like the first time he steps up, give him a treat (even if you just put it in his dish) and put him back. Next time, do a bit more, etc.
• Try working with the step-up first and earn his trust before you try scritching his neck, unless he drops his head and offers to let you.

I can't think of anything else at the moment, if I do, I'll post it here. Maybe other members will have other ideas or suggestions to try. If you have any questions, feel free to ask. My apologies for taking so long to answer. I kept trying but a few got lost in cyberspace and my pc froze and lost another, and yet one more I accidentally closed the message window. I've also been put on meds that were making me very sleepy so I kept dozing off! Anyway, I really hope this helps because 'tiels are great little birds and can be very affectionate. You must realize though that I'm I bit bias since I have 12 adults and occasionally have bbies I hand-feed. (I have 19 at the moment.)