Let’s say that my thigh or hamstring got najis with urine. I then go under the shower to make my lower body pak. I need to wash two times to make it pak so I stand under the shower once and try to let the water flow in the affected area then I close the shower. Then I re-open the shower to do the same thing to do my second wash. But after both of these washes, do I need to wash the bath tub floor? Will the bathtub floor become najis from water drops falling from my body onto the tub through this process when parts of my body aren’t connected to the shower water?

It becomes pak automatically you don’t need to wash the tub again