"I can't do this!" I snap at Greta for the fiftieth time as water sloshes all over me, and I lose my grip on the plate I am attempting to wash and send it skidding across the huge steel tub before it smashes to smithereens. Cursing myself for first scalding my own hands with hot water and then managing to crack three glasses that I dropped in the sink before I realized I should place them in carefully. I'm losing my last nerve. How is this so hard to master when it seems a relatively straightforward task? Everything is so slippery, and this sink is like a bathtub; it's vast....