So, MY key fob to the van has been acting up all winter. It intermittently doesn't register a button press. It seems to have gotten worse and worse as time goes on. Locking, unlocking, and remote starting the van has become a PITA.
My wife's key does not exhibit the same behaviour, so I know it's not the receiver unit in the van. I changed the FOB battery, alas, to no effect.
Luckily, when we bought the van, the Doc fee we paid at the dealership included key insurance. If you lose or break a key fob, you get a brand new FOB with zero deductible.
So, I am choosing to exercise this option and get myself a new key fob for my van. Appointment is made at the dealer for Monday afternoon.