How much you need to put on bed for room servie? Do I need to tip on my check-out day?

It's up to you it can be any amount or none ..I think 15 dollars for a 4 / 5 day stay is fine

Usually I put $10 per day I stayed but I tend to cap it at $50 if I stay a week. I'm also trying to keep things clean by throwing garbage in containers and not making a mess in the room or increasing their work in other ways

i dont know how much i never asked them

Generally $3-$5 a day is the traditional amount.