1. Feeder Gob too long and too small in diameter Glass too cold   1. Feeder Reduce length of gob and increase its diameter Increase feeder temperature   2. Machine Setup and Operation Insufficient swabbing Blank molds too cold Delivery equipment dirty Blank molds dirty Excessive spray in the scoop and trough Blank overworked   2. Machine Setup and Operation Swab correctly Reduce blank mold cooling wind Change or clean the delivery equipment Change the blank molds Reduce the spray on the delivery equipment   3. Mold Equipment Incorrect blank mold shape Funnel too small 3. Mold Equipment Check for correct blank mold design Check the funnel size and increase opening as necessary