For us AirDrop only works sometimes. It cannot be trusted to work. We have two ipads, two iphones, two Macs. Some new, some old. In general AirDrop only works

For us AirDrop only works sometimes. It cannot be trusted to work. We have two ipads, two iphones, two Macs. Some new, some old. In general AirDrop only works between some devices, depending on device ages and (I guess ;-) the moon in conjugation with Apple's stock index. If it works, its only after waiting a while, switching BT off and on (maybe repeat that), meanwhile doing some praying...