If your like me and a single parent that don’t have someone to help you I use to use the big bath and empty it then when it got to a certain level I would use warm water and rinse her off but I make sure the bathroom is really warm so she doesn’t get too cold and she doesn’t seem to be cold
I just use the bath water that she's already in and make sure there's no suds/ bubbles in the jug, I don't change the water (she's bathed every other day and head to toe wet wipes the day in-between if needed) xxx
We first kept a separate measuring jug with clean water. My husband would lift baby and I would carefully pour water over to get rid of remaining suds. We then slowly introduced shower head as ours has quite high pressure even when it's on the lowest setting. Now we use the shower head. Hope that helps!