fullm3talxI have had some trouble with this too. However, I found that if I first push it in hard, it seems to come out easier. There also seems to be a sweet spot/angle as brute force wasn't working for me either, so I was surprised when they came out really easily when I tried these steps (through trial and error - got some great blisters experimenting!).
fullm3talxThere used to be videos on Westone but they apparently got pulled. YouTube has a few and folks have recommended wiggling gently left to right while pulling the connector. Others recommend to pull straight out, which works for me. There is apparently differences between unit since they are reportedly seated w/heat. But anywhooo, everybody recommends to keep the pulling out to a pure minimum to avoid a weakening of the seal and connection. It seems that pressure between the unit and the plug (like inserting a fingernail) would help pushing out the connection. Good luck w/that, its a finicky operation.