Here's a feeding chart to help you out.
Your snake is chasing your hand because she's HUNGRY!!! She hasn't been fed a proper meal yet. What you're feeding is way too small.
You're also adding unnecessary stress to both you and the snake by going in every day to change water. Every few days is fine as long as there is always clean water available.
There's no need to change substrate weekly either. Every month or so is fine as long as you're spot cleaning any waste.
I admire your commitment to cleanliness, but you're actually going overboard. Basically, don't open the enclosure unless you have to.
Get your girl on appropriately sized meals and you'll see her mellow out, I can almost guarantee it.
As for striking your tongs/hand. It's either because the prey isn't warm enough or because it's too small...or a combination of the two.
She's bypassing the prey because it's too small. She smells food, but picks up the heat signature from your hand looking right past the rat because she doesn't recognize it as prey.
Get her some appropriately sized prey and you'll see a difference almost immediately.
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