With Daniel's new HOOF technique, do you have to actively focus on your feet during the day, or will the unnatural feeling work anyways?

That reminds me, I was going to do that today, I suffer from poor circulation so a warm foot will feel very alien. I'm now adding into my RC/awareness!

You don't have to focus on your feet all day. The point is to incorporate the feet check into your daily reality check routine. When you're dreaming, you should notice the difference in feet temperatures and this should trigger lucidity