How about a foot pedal for turning the water on for rinsing, so it doesn't have to run..
Oh, bad idea with kids who would waste water playing with it.
How about a sensor that turns on the water when you put something under the faucet. I believe those really exist. That would rinse well and conserve water. You could offer to pay for it. Just an idea.
Edited for typo correction.
I love using a washcloth. IMO, they stay sudsier longer. Plus, they are SO much easier to clean. I have about a MILLION washcloths that I rotate. They sell ones now, I've seen them at both Walmart and Target, that have a layer of scrubby mesh sewn to one side of the washcloth. I use those a lot, and they work really well. :)
There are days I will use more than one washcloth b/c I refuse to let them sit between meals and grow bacteria (same concept as a sponge IMO), so as soon as I'm done with a load of dishes I will put the washcloth in the laundry room to be washed, and I grab a clean one the next time I need to wash a load.
Kara - Homeschooling mom to Greyson (13), three lazy cats, two hyper dogs, and 11 crazy chickens. Loving our life on 5 acres in the middle of nowhere. TTC #2 for over 12 years. Soon to be a stand-in mom for foster babies!