The combustion blower on my 10-cpm got really noisy tonight. It's a high pitched hum/whine and it grates on my last nerve. The stove seems to be burning just fine, nice clean burn etc. I pulled the blower and cleaned and installed a new gasket about 3-4 weeks ago and it was fine until tonight. The combustion blower can't be oiled, right? Any tricks for quieting this thing down? I sense a new blower in my future, but that doesn't help me tonight. Thank in advance.