Wick won't light

I didn't realize how quickly condensation can enter the tank. Condensation will ruin the wick permanently, even a brand new wick.
To avoid condensation, do NOT empty the tank unless you are replacing the wick, or some other repair requires it. Likewise, do NOT burn the kerosene out, for the same reason: condensation.
When the tank is filled enough, condensation can still enter but the wick will be able to burn and you won't know the difference. But as soon as the kerosene is gone, all the wick has is water. 
STORAGE:  When you burn out the kerosene to store it, condensation can enter and you will not be able to use the wick again. So unless it's necessary, don't burn out the kerosene.
If you have to store the heater in a place that requires the tank to be empty, dissassemble the heater before you use it again and make sure the tank is completely dry and contains no water BEFORE you use it again.
I think but I'm not sure, that the tank must have been designed to let some condensation fall to the sides, or somehow get out of the way. But I'm certain this doesn't last because condensatiion is inevitable and it will accumulate.