I agree with SilverStreak. That would drive me crazy. Hair Club does these 'hard bonds' and I always thought it was unsanitary to keep a unit on your head that long. The scalp gets 'itchy' going that long without a cleaning. That's why Hair Club sells a product called 'Alive.' 'Alive' is an organic cleanser/enzyme that cleans the crud that accumulates on your scalp resulting from going weeks and weeks without removing your hair system and properly cleaning your scalp. You squirt the liquid through the hair system base while the system is attached, therefore not interferring with the 'hard bond.' I get itchy just thinking about it.
Regards,
John