There are some articles that say that there are plants that can help reduce humidity, but I don't buy it: http://www.gardenguides.com/135953-hous ... evels.html
Mildew and molds grow when relative humidity goes beyond 75 percent. Dust mites propagate faster in surroundings with high humidity levels. Some house plants can reduce humidity. A few to consider are the reed palm, peace lily, English ivy, Boston fern and tillandsia.
I do believe the part about mildew and mold growing at above 75%, though.
This article says that dust mites are greatly reduced at humidity levels under 51%. http://www.ncbi.nlm.nih.gov/pubmed/11149998
That seems pretty unfeasible in Taiwan, so I'd be happy to keep our indoor humidity levels around 70%. At this point I just run the AC and have a dehumidifier that goes on from time to time.
What do you do to combat humidity, mildew, and dust mites in this sub-tropical climate?