teak garden furniture

I have some teak garden furniture, but has no black spots, how can I clean them?
I have some good outdoor furniture teak had for several years and am very happy with it, but this year some black spots appeared on it, are the black points why they occurred and how I clean them? I want the furniture to stay as natural as possible.
Teak furniture and also met with black spots as well. A brush soft and mild detergent (laundry soap and water) work well. There are also commercially available protection for teak and teak oil. (We buy furniture and instructions for care CedarStore.com law on its website.)







