I can go weeks without changing tips ,,, dont overthink this welding thing ,,, get some metal to practice on , and get stuck in.My tip is total 24mm length about 6mm diameter at thread, 0.8mm. I have read very cheap tips burn out if wire jams, do the ones you use last longer?
On some second hand adverts people have tip dip,spatter spray,gel of some kind do I need any of these for good 1mm metal using co2?