I use white distilled vinegar to descale it every 8 mo.

Everything in the unit (floor to ceiling) was wiped down with vinegar/water and then I shocked the entire unit using an Ozone Generator. 

Score and white vinegar and water or steam.

This clears that air of mold and stops mold from spreading on walls/surfaces.I've previously used bleach/vinegar to try to get rid of mold on my own and it wasn't nearly as effective, which is why I leave it to the professionals.

Personally, I wipe everything down with a vinegar solution.

Discovered the magic elixir of Dawn dishwashing soap, vinegar, and water. 

Sometimes you catch more flies with honey than with vinegar, plus, we live on an island.

@Ivan Chavez if you really want to go above and beyond: clean out gutters, inspect all appliances (or at least those you provide) ice and vinegar in the disposal, check stove elements and use oven cleaner, run vinegar or bleach through the washer, vinegar or bleach in the dishwasher, clean the dishwasher strainer, check light bulbs in vent hood and change charcoal filter, electrical system check-make sure gfci work with a tester (not the button), check all bulbs, fans, and outlets, plumbing check for leaking toilets, dripping p traps under the sinks, you can also check resistance on electrical water heater elements to make sure they aren't busted.

You can test it by using a spray bottle and 50% white vinegar and water- soak until soft and pull from a corner.

You get more flies with honey than vinegar.