Abstract: The present disclosure is directed to methods and devices for reducing or otherwise mitigating accumulated reagent material and/or fluids within a dispense nozzle of a dispenser.

Abstract: A massaging device comprising a hollow case (1) which delimits a sealed suction chamber during application of the case on the skin, and a connection of this case (1) to a suction source. This massaging device comprises two parallel inner rollers (12, 13), which are accommodated entirely inside the suction chamber, and are designed to form a fold on the skin, and to roll this fold when the case (1) is displaced, and two outer rollers (16, 17), which are parallel to the inner rollers (12, 13), and are disposed to the exterior of the case (1), such as to withstand at least part of the sliding force of the case.