I don't know that anyone else would care for this method, but I have always used very thin inch-long strips of red duck tape to mark my lines. The strip is about 3/32 of inch in width. I lay the line in the middle of the strip and twist it into a tube around the line. The only draw back I ever ever noticed is that some of the tape's stickiness can be picked up by adjacent line, but this is easy enough to deal with. The advantages are that it takes about a minute to set up a marker; when line length changes for any reason, markers can be relocated with little difficulty; the red tape is very visible even in low light; the markers stay put and one roll of red tape will last two life times. One caveat, my running lines are 40# Momoi. Only my WFB rod ever gets into the spectra backing and this is the first year I have ever twisted the tape onto spectra so its somewhat untested there.