Aerosol emissions within an inkjet printer are reduced. Preferably, the protrusions on the top edge protrude toward the interior of the lacrosse head and the protrusions on the bottom edge protrude away from the interior of the lacrosse head. Each element operates at a different voltage. This is desirable in the application of an automatic massage chair where the rollersensor presses upon the user’s back and may cause the point of contact on the user’s body to move away by means of the user flexing at the hips or arching through the back. Additionally, portions of the mesh insert and support tray may be used with such processes such as lens coating and surface treatment.