Hi all Sanyo Z1 owners ! How do you "clean up" your Sanyo Z1 projector ? I mean the air-filter & air-in-take valves ? (1) I use "running water" to wash the air-filter; (2) and then use "vacuum cleaner" to clean the air-in-take valves (which the Owner's Manual also mention this method) Do you think the above method is good & enough ? Would like to share the experience on the projector maintenance with all of Z1 owners !