A few drops of Ronson lighter fluid (a.k.a. naptha) into the carb will help in cold weather. Also, I find the 1.2V NiCd glow sticks are not so good in cold weather. Glow plugs are designed for 1.5 V. A 1.2 V NiCd starter works OK in warm weather but not so well in very cold weather. Try a power panel.