I have a brinkmann gourmet electric smoker. I'm new to smoking. I had read that a lot of folks will use a foil packet for their wood chips. When I tried this the heat element actually melted through the foil and caught my woodchips on fire. I ended up spreading the woodchips around the element and this worked very well (very messy) but It seemed I needed to replace my chips every hour or so to keep the smoke flowing. Is it normal to have to replace the chips so frequently? does anyone have any advice?