I know it sounds like an odd question, but I really want to know... I mean the actual process.
Here's why I am asking... When DS was little, he had one of those baby baths that would fit into our big bath. That way I didn't have to faff around filling up the big bath. Just filled up the small one, add soap, scrub DS with a washcloth and when done, hose him with the shower to get all the soap off.
Now that he no longer fits into the small tub, he goes directly into the big one. It takes ages to fill! So I only fill it a couple of inches so that DS has some water to sit in.. I don't actually add any soap in the water. I take a washcloth, wet it, put a few drops of soap on it and scrub DS. Then I let out all the dirty water and wash him him again to get all the soap off. I may fill the tub again if he wants to have a bit of a splash around.
While at a friend's place I saw her put her DC in a bathtub full of bubbles, let them splash around for a bit and then just took them out and wiped them. No rinsing off the soap.. No washcloth. It seemed so much easier! That got me thinking if I have been doing it wrong all this time 
Inputs please.
TIA 