Hi. My Napoleon 1401 wasn't blowing air as it used to (5years old now), so I dissembled the front panels and removed both blower assemblies. Each blower was difficult to turn, as if the motor workings were gunked up. So I vacuumed and wiped all accessible areas around blower and motor. Still hard to turn. So I separated the motors from the blowers, and tried spraying WD40. That got them to turn really smooth. It looked like (can't be sure) there are little tiny bearings inside with some white stuff (white grease??). Not sure. I added some 3-in-1 oil where I could. Reassembled all. Worked great for about a week. But now getting noticeably weak again. I asked my (more mechanically oriented) neighbor, who suggested WD-40 was the wrong way to go as it would cause premature wearout. Did I do something wrong? More importantly, what's the proper way to service these motors/blowers? Expensive to order a complete replacement of blower/motor assembly if perhaps only needs some maintenance. All advice appreciated!