Have tried many different types of soldering iron over the years, Avoid the weller Microtip irons, the screw that holds the tip jams and breaks leaving you no way of replacing the tip
current favourite is an Antex XS 25, only a 25 watt iron but excellent quality, Tips last me about a year each (gets used about 15 hours per week) if you decide to get yourself one of these irons do NOT clean the tip with emery etc as they are coated, once the coating goes the tip goes hollow and fails quickly.
as others have noted I have never used a damp sponge or similar to clean the tip. (nice to read that I am not the only person that sometimes wipes the tip on the leg of my jeans)