Though some air does get through that....I would take it off for 2 reasons....#1 its silicone in the air/vapor path. And #2...it is restricting the airflow and probably causing you to raise the temps by using higher wattage. You should be able to get better vapor quicker with more air coming into the top of the G43. Plus...it is not allowing a full wide path of air and possibly will create hot spots in the heating element section. Try to find a piece that fits around the glass part....not messing with anything in the entry of the top. To me...it is already more than enough to have the wires coming out of the top. Ideally I wanted to drill holes in the side to put the wires through....but it would need a diff glass slide to do it properly.