What is the best way of cleaning mold?

Cleaning up mold is part of the answer, but please don't forget that molds emit mycotoxins too, and along with cleaning up the mold, you may also have to clean up the mycotoxins. Also, cleaning it up is great, but if the cause isn't fixed then it's going to return time and time again.

OK, so to clean it up? A cheap way is to use a cheap white vinegar from a supermarket. Make up a solution of 80% white vinegar and 20% water. I tend to just spray paper towels with this and wipe the affected area, then discard. However, I know mycologists doing a larger area will generally soak a microfiber cloth in the 80/20 vinegar/water mix, wring out as much as possible, then wipe one section of the affected area. Then they will rinse the cloth in a bucket of water, wring out as much as possible, then soak again in the vinegar mix and continue as set out above. One thing to note is that this may not clean up mold stains, but it will absolutely kill the mold. The mold eats it. This has a reaction along the entire length of the mold hyphae and my understanding is that the mold gorges itself to death - it literally explodes.

Another option - a commercial one - is to find a business that uses a fogging spray (in America I believe it's called Deconshield). This has a high mold kill rate. There are also carpet treatments available which are very effective. Sometimes carpet cleaning businesses may do this service, but finding a good company could require some investigation. However, if you have issues like a wet concrete slab caused by eg a yard that is higher than your house, where water runoff pools under your house and if there is a hole in the plastic membrane underneath the slab, then any carpet treatment will only work temporarily, as the damp issue will continue and mold will grow once more.

There are lots of other options too. I'm aware of a tea tree product that can be used in air-conditioning systems, I've been told that oil of oregano is also good, and so forth.

One thing to remember is to NOT use bleach on porous surfaces (wood, walls, etc) as the chlorine component of the bleach will not penetrate the surface, while the water component of the bleach WILL, thereby feeding the mould and making the situation worse.

If your health is poor as a result of living in a moldy environment, then I would recommend (for general health) a liquid zeolite supplement, along with some liposomal glutathione.