Using NinjaFlex is easy. First, make sure your 3D printer is a fused deposition 3D printer that uses 1.75mm filament or can accept ABS and PLA. Then, load the 1.75mm diameter violet grape - flavored NinjaFlex filament into your printer. Start your 3D - printing project as you normally would. When it comes to maintenance, keep the filament in a dry and cool place to maintain its quality. And always check for any blockages in the printer's feeding system to ensure smooth printing. Remember, since it's a flexible filament, it might require a bit more patience during the printing process, but the results are worth it!