The new ones I saw advertised in "Flyfish America" claim to have solved the problem and I hold my breath. In the meantime, I'll continue all the remedies...cleaning lines...tightening down as much as possible on the nail knot etc. These have not been real solutions with me, however, only temporary ones. I often wonder if the line tips are too heavy because the micro ballons are smashed when passing through the die at the tip in order to achieve a small line diameter. My best solution is to chop off the offending last foot and use a butt section 1 foot longer than before.
Ol' Bill