Apparently no-one does! LOL. I have had both fusion and micro-ring fittings and my head can be irritated at times. And it isn't all the time as you say but is some of the time. The only suggestion I can make is to ensure that they are not in too tight, too close to the scalp and then rinse, rinse, rinse very well when you wash. After that you must dry the roots very well. Never leave it to dry naturally. And take care about products on your bonds. Remember you have to avoid normal shampoos still, even with micro-rings otherwise you will degrade the glue holding the extensions together.
Linda