This is a very obvious question - but, when the dparents have carers coming in daily, does it work to have the dparent let them in (or do they ever not hear the door, or just forget? I know it would depend on the individual, obviously, but would be grateful for any advice!)
I know the alternative's a keysafe - are there any that pp would particularly recommended as being ultrasafe? (Old habits die hard, so the idea of leaving a key outside is quite nervous-making for a newcomer to this!)