What should I use to clean my cloner with?

So I have a cloner than Im taking out of storage to use and it smells slightly mildewy. So I need to know how to clean it. Normally when I am cloning and need to clean it I just change the water and give it a good rinse and add some H2O2 to it and let it run for the night before I put anymore clones in it. Would this be good enough or do I have to do something else.

That would be enough.. I would use more h2o2 than I would with the plants... but that should get you STERILIZED...