Uber and Lyft drivers work hard to deliver a valuable service. But too few of them adopt a rather simple principle of customer service: When it’s very hot, turn on the damned air conditioning.

I understand if I sound like one of those jerk customers, but that’s the result of sitting in a car for a summer journey in Washington, D.C. As customer service oriented businesses, Uber and Lyft should be doing far more to encourage drivers to employ air conditioning. It’s a concern for two reasons.