some solutions have a much small action range than bleach. bleach is definitely more effective than a lot of other things you can find. ive heard you can follow it up with a aquarium dechlorinator rinse afterwards just to be sure. bleach is also very cheap and easy to obtain. and will also last you a long time because your diluting it 10:1.
you could also look up oxine ah.
The Many Uses of Oxine AH (Animal Health)
they say its much milder...
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bleach would be the way to go. just use it right. it kills almost anything and is cheap and easy to get. if your worried about not getting all the fumes out (which rinsing, air drying, and wiping) will do fine, use an aquarium dechlorinator.