Proper gowning and gowning procedures reduce, but do not eliminate person-generated particles. We have observed gowning procedures where, rather than gloves used only for the gowning itself and then replaced by clean gloves at the end, the gowning gloves are omitted. Particles from bare hands and face during gowning may deposit on the cleanroom attire and subsequently transfer to the cleanroom gloves. The particles can then be transmitted to the product during normal handling. Since the particles are not airborne, they would not be detected by air monitors.
From: Spots Before Your Eyes