Unburned fuel coming from front nose cone when...

Question

I have a Reddy Heater R55, s/# 3349330. I had just recently replaced the spark plug because heater would not ignite. After repalcing spark plug unit ran great. I useed the heater tonight, about a week after replacing the sprk plug and i noticed small unburnt dropps of fuel blowing out past the cone onto my floor. I ran the heater and looked at the cone and i see small drops of fuel hiting the inside surface if the combustion chamber after the cone. I have no idea why but it is getting cold here in Minnesota. thanks