contact poi definition: the process of manipulating the poi without gripping it.

Firstly, your poi: The poi body: the length of poi between handle and head, should be made from comfortable material to have constantly rubbing against your skin- generally something thicker than string would be advisable (sock poi or cone poi are the best in my opinion). You also need to have weighted handles. It depends on the weight ratio between poi-head and poi-handle to where the "propellor point" or "contact point" is. (NB: I am making these names up - but they seem to be quite fitting).

I have found that a ratio of 2:3 handle to head is optimal for ease of propelloring (propellor definition follows underneath) and also for not disrupting the rest of my spinning repetoir, actually, I'm not entirely sure what my weight ratio is... but it is best to experiment with weights to find whatever suits you.