Leave them there. Eventually the Guardian or Enquirer or Globe will publish a story about the mysterious ski-like devices spotted from the ISS and speculate as to how many millennia they have been there.
Then Erich von Däniken will write another book citing them as proof of his thesis..
He IS past due for another one...
The fact that it attained that temp on the interior of Ye Olde Farmhouse only 2.5 hours after it did its setback (normally it reaches its setback temp just shy of 0530) indicated that the glowbull warmthing people have connected their Peltier plate backwards again and the heatpump is pumping heat in the wrong direction here - much like glowbull warmthing when observed sans manufactured hockey sticks.
I ventured a peek at the temperature-sensing device on the exterior of Ye Olde Farmhouse and note that it indicates it is -21 °C. Thankfully tonight there is no wind. Sunday night - Monday morning we supposedly will get the wind.
And temps down to -23 °C.
I might need to take a trek down the basement stairs to do a visual on the gauge on the tank of #2..