Wow. Just wow.
OP, this paranoia of mostly harmless bacteria is less healthy than exposure to the bacteria itself. You are likely creating an environment wherein your children will be sensitized to atopic disease (i.e., allergies and asthma). There is a strong scientific link between hyper-cleanliness and allergies.
Not only that, but you are damaging the environment and wasting a lot of money.
Just use a sponge and throw it in the dishwasher on the "sanitary" cycle if it becomes a little dirty. Most bacteria can't reproduce on dry, sunny surfaces (e.g., your kitchen counters).
We use about 1 roll of the select-a-size per month. Dishtowels and sponges for most kitchen tasks. My family hasn't gotten sick from eating at home EVER. Neither DH nor I has gotten gastroenteritis since we've lived in our home, period (though, full disclosure, DD had rotovirus this past year, which she contracted from a playdate and which isn't linked to food hygiene).
Seriously, you are going to be JUST FINE and probably healthier if you step down your paranoia! Relax!
