Some ProForm treadmills require lubrication every six months or so, depending on the usage amount. Lift the walking belt and feel on the underside of the belt. If it is dry, you should lubricate it. ProForm recommends you use 100-percent, non-petroleum silicone spray to lubricate the walking belt. Do not use wax or other lubricants, such as WD-40 or a Teflon-based spray
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