Tuesday and Thursday mornings I am home in the mornings before teaching a class at the community college in the afternoons. Often this means I am scrubbing down the kitchen sink, cleaning the counters, and wiping down the fridge (our new-ish stainless steel fridge is my cleaning nemesis). I used to always microwave the sponges we have to keep them clean, but the boiling hot water coming out of them was tricky and if you waited for it to cool, it kind of defeated the purpose of cleaning it.
This summer I came up with a super fancy sponge cleaner. Vinegar in a squeeze bottle from Target. I squeeze out the sponges really well, fill them with vinegar and let them sit for awhile...done.