Water Down Your Dish Soap

Seriously. It works the same I swear.
I buy Palmolive anti-bacterial and water it down. I have one small dish soap container I got in a gift basket, but I'd say it's worth the extra pennies to buy it so you have it to refill. Then I buy a big soap container from the dollar store (Dollar General usually) or if you have a Sam's Club or Cosco situation that'd probably be good too (don't be afraid to price compare and save a penny or two - they add up quickly!)
Then I fill my smaller container about 2/3's with soap and the rest of the way with water, shake and good to go!
I took a microbiology when I was in school for nursing a while back (Before Baby - BB) and my lab teacher actually had her antibacterial soap diluted so much it was almost clear! It still has antibacterial properties at that level.
Actually, we did an experiment about antibacterial things like soap and those instant hand sanitizers only to find the most efficient way to get germs off of your hands is to scrub!
So do not be afraid to water down your antibacterial dish soap. You will only make it last longer, not make it work less!