Review on Dyna Purge Clean Sticks 1 75Mm Printer: Efficient Solution for Printer Maintenance by Brent Henderson

They are really good at changing filament types for printing which can have different temperature ranges. I remove the previous filament and then feed one of them to clean the remaining filament, lower or raise the temperature, remove the cleaning filament and then feed the one I want to print with. Helps maintain excellent nozzle flow and prevents clogging. I tend to use the nozzle cleaner as well when deployed to remove any residue from the previous filament and they work well together.