Inner shift boot is fighting you. Lots of guys have removed the inner boot entirely. I've also seen a thread where someone made a new inner boot out of a softer inner tube material. You can also hot bend the shifter a bit.
When it's really cold in the morning, I let it heat up a bit more. If I get in and go, I have to hold it in second until I give it some gas. It pops all the time. It keeps the gf out of the driver seat, so there is that benefit.