Thanks so much for your detailed answers Paul!
I had read about using a washer with a small opening to restrict flow - is this the same concept as the resistor? Unfortunately, I haven't been able to find the washers. Your comment about increasing the water supply makes sense & I was speculating that was needed. I'll wait to see the picture of your "blue plastic thingy", then off to Home Depot I go.
Many thanks!
Liz
