Remember that we had a few days where the low was 0 - so yeah you kept the temp relatively low at 60 but that’s still your radiator trying to heat ~20k cubic feet of air up 60 degrees; it’s like if it was 30 degrees and you were cranking it to 90. It was bound to be an expensive month.

That all being said, insulation is def something that’s easy to do that and pays for itself quickly. Def do the audit with BGE beforehand where someone comes to your home and runs diagnostics on it to find where heat is escaping - that’ll help you a lot in figuring out where to focus on. Also consider Budget Billing.