with June; vaccum it clean. After more than a year of running my 560 four to six days a week, my original filter still looks fine. In fact I religiously vaccum my entire robot after every mission. Friends laugh when I tell them that I need three vaccums: One to clean the house (Roomba), one to clean the Roomba (my old upright), and one to clean the upright (my Shop Vac).
Due to the cleaning required to keep a Roomba in peak operating condition, anyone that thinks one will save them time is sadly delusional (or a noob). No, the only reason to own a Roomba is for its robot-like efficiency and thoroughness (pun totally intended).
But back to the vaccuming-thing; as any old bicycle mechanic knows: Cleanliness is better than Godliness. The reason I use a vaccum to clean my vaccum (Roomba) is that short of completely dismantling something to clean it, the best way to remove contaminants is the same way they got in. Using compressed air to "blow out" components runs the risk of merely driving the contaminants further into the works. The vaccum draws contaminants out of the Roomba along the path I know they used to enter it. Kind of a "Path of Least Resistance" thing.