Avic sling

It could look like it is about to molt anytime now. Try stop the feeding 3-4 days, just provide it with a small water dish.

Like a plastic bottle cap

Might be in premolt. Hold off on feeding and feed again in a few days. He gets a nice little hammock, your T seems to be getting ready

They might be in pre-moult. I feel ya, though. Mine have both just moulted and, one out of the two, has to have their food put right in front of them. Still, they didn't eat very long and have dropped it to the bottom of their enclosure.
They worry me to death.

How long does that usually take? Im gona keep her a little more humid than usual if shes going to molt.

@VanessaS its really anoying when the crickets drop to the bottom. Its impossible to get them out without disturbing the spider. I worry about this sling more than any of my others. But her web is sealed kinda tight so i dont think they will be able to get to her.

I actually have my two in enclosures that open in the center, so they are actually easier to get stuff off the bottom without disturbing the spiderlings who stay in their web hammocks at the top.
I'm just not digging their feeding response. All my other spiderlings will eat almost every meal, except in pre-moult, but these two are very finicky eaters. And it doesn't matter what I feed them - they just don't eat enough.
I've been told that is normal for arboreals, but it still makes me worry to no end.