If your retrieval line is spectra/Dynema with an outer hose/cover, you can also strip the cover off and leave just the core where it rubs against the spi. Restrain yourself and dont strip more than you need to, as the core is very slippery and hard to handle. My crew hates the part of the retrieaval line where the cover is stripped off, but we removed too long a section..

Having a good working snuffer setup is also imperative. If it's a poor snuffer, the spi will clump up and holes are inevitable.