Are there loops or rings at the retrieval patches in the spi, or grommets/holes? Depending on how you rig the spi, you can spread the grommets out a bit with knots or balls on the retrieval line. Usually this is not neccesary once you get the feeling for how to go through with the procedure.

There are a load of tricks to make snuffing easier, but the patches do tend to bunch up. It is important to snuff with a bit of pressure/wind in the spi, and do it as fast as you can. You ideally want to pull the spi _down_ into the snuffer, not _up_ into the snuffer. Friction is your enemy, and Holmenkol (yes, really. Internal joke for us norwegians) Seal'n Glide will help a bit if you go to the expense.

I guess the Stealth owners to chime in once they are done with their afternoon tea