i used to but not any more unless the hair feels particularly dry. I can see why it'd work for some people but I put the great longevity of my last system down to the fact I interfered with it as little as possible. I sometimes had issues with LIC leaking through and affecting the bond a bit. Also, sometimes it can have adverse effects on the hair after a few days (makes the hair even dryer for some reason for example). Probably depends a lot on the type of hair you have but I don't miss using it at all.
