whirlfloc - How a noob would use it

[Liam_snorkel]

another thing that (in my most humble opinion) helps, is leaving the lid on after whirlpool and while you're draining it.

If you take the lid off you'll notice a huge puff of vapour which continues to be released from the hot wort. I'm sure there would be associated convection currents which lift the trub off the bottom of the pot, disturbing your trub cone/layer.