For 2nd homes you can also not charge.
When someone come to your main or 2nd home, it has to be cleaned.
And when you go to the main or second résidence of your host, it has to be cleaned.
It is the same with GP.
Someone come to your 2nd home and it has to be cleaned and you use these points to go to another place which has to be cleaned.
So the total is 0.
Because EVERY host must clean their house.
Never mind it is you or a professional because when it is you, your time is also money.
This is why cleaning fees are inapropriate when exchanging because ALL the places must be cleaned.