Alright Jimena,
You should run it at least once every 3 months even if the prints look okay to keep your model print head in top shape. You can also control the quantity that’s being purged if you have access to the maintenance menus but I wouldn’t recommend changing too many things in there if you printer is still on warranty.
One other important thing to know is that the Durus material has a tendency of clogging the print head’s nozzles pretty quickly so you should avoid that one or or use the reinitiate sequence more often if you use it.
Don’t forget to upvote on my comments if you appreciate the help.
Regards