Maintenance and Cleaning
Your telescope is a precision instrument that does not need a lot of maintenance. When you are observing in humid conditions, the telescope will get wet with dew during the night. When you take the telescope back indoors after the observing session, do not immediately put the telescope into a sealed compartment. Put it on a rack or some other place where air ventilation can happen and let it dry before you put it away. Exposure to moisture does not harm your telescope directly, but permanent exposure might cause the growth of fungi that will have a negative effect on the telescope.
Mechanics
When you notice that dust or pollen has gathered on your telescope you should wipe the telescope clean with a cloth and maybe some glas cleaning solution. Rack out the focuser to its most outward position and wipe the drawtube. Remove all dirt or other particels from the surfaces that are involved in the movement, like the surfaces that have contact with bearrings, and use a brush to remove all debris from the rack. When there is some kind of fatty or oily stain, gently remove it with a cloth and tissues that are wetted with glas cleaning solution. If you feel that the focuser is running rough, you might apply a little vaseline onto the rack of the focuser. The important word here is "little".