We also like the air temperature to be 60 or less when we sleep.
And, we also had a Safe & Warm blanket, which we used at our house. One side failed after five years or so and we replaced it with another.
Then I pulled out an older, very lightweight down blanket from the closet and we liked that so much that we quit using the electric blanket altogether.
We also have a similar arrangement in the trailer with another lightweight down blanket. We have slept comfortably with lows ranging to the 20's by adding a light
fleece blanket on top.