Lynn I have used the candle shade toppers like you (with the stars and hearts) on my mason jar candles and I have used the witch hat toppers for my pumpkin jars and I have never had a problem with them. I actually find they burn cleaner with the toppers since obviously all of the soot catches in the top. I have the snowman jar and the hat, I will have to try it and see how it does for me. I have occassionaly run into the problem where a wick here and there will not light or stay lit. Try your other toppers and see how those do. Maybe there is not enough oxygen getting into the hat to stroke the flame.