Ambient? With the weather getting colder here, we saw our ambient dip and some of ours started doing the exact same thing you're describing. Constant activity, searching, pushing on lids, even had 3 refuse rats that I would've told you the world would've had to stop spinning to get them to not take a rat. We bought a space heater for the room - one that has a built in thermostat - and are keeping out ambiant more in the 78-82. Boom - everyone's back to eating and hiding. All is well. The heater isn't setting directly in the floor though. We had concerns about carpeting as well. So it's on top of a piece of melamine.

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