As many of my friends are lovers of teak (and maybe even lucky owners!), I thought I would point people in the right direction of proper maintenance...I found an awesome article about maintenance by Jennifer Akre on ezine@rticles. Here are some choice parts:
First, the good news about indoor teak furniture...
Many people who have teak furniture in their homes purchased it because they believed they could have very beautiful furniture that didn't need a lot of baby-sitting. Unlike other tables that need regular oiling, cleaning and care, you can literally leave teak furniture for months, or even years, and it will remain as strong as it was when you first got it.
Second, the maintenance plan...
The first thing you need to do is thoroughly clean your teak furniture. The removal of dust and debris in from your furnishings should begin with a wiping down of the furniture with warm soapy water. Then look for particles that may have gotten caught in between pieces of wood and remove those particles.
Once it is clean, allow it to dry completely.
Now you can decide if you want to allow your teak furniture to change colors or maintain that orange-brown shade it came with. The way you can maintain your original color is to re-oil it after the cleaning. Teak wood has a high level of natural oils, but by adding a new layer after you have cleaned and dried your it, you will offer a little extra support, keeping it looking new for years to come.
Taken from Teak Furniture - How To Clean Your Indoor Furniture.
3 hours ago