Hi Myrna- I color my grays too, so I do get that. One thing I can tell you is this; since I have eliminated glycerin for the summer, my color seems to last longer! I have read that glycerin pulls color out of hair, and didn't pay much attention to it until I noticed it as a side effect of not using glycerin anymore....

I also just wanted to say something about you not using leave-ins anymore- from my understanding with low porosity hair, your rinse out is not really ever absorbed, so moisture that stays ON the hair for longer, is more important. (Per KathyMack)
2C/ Coarse/ Normal porosity/ SW Florida/ Salt & Pepper
Cleanse: AIA cowash, TJ Tea Tree Condish
Condish: JC Too Shea, Tresemme Botanique
Stylers: flax/okra gel or KCCC + CJ PP or JC Spiralicious
Experimenting with Got2B Ultra gel and loving it so far!