Recently purchased a teak table and chairs for the deck. Followed the instructions and treated them with 3 coats of teak oil before exposure to the elements. They have been in the garden for about 3 weeks now and I noticed this week that there are splits developing in the wood on both the table and chairs. It doesnt look too good but I'm more worried about the what might happen over time. Should this have happened? I would have thought that buying teak would have meant that we didnt have to worry about this for a few years?