While many people think steam heat is outdated, it's actually an excellent source of heat; it gets hot quick and holds heat for longer.
But it runs dirty, and you have to service it yearly to maintain good operations.
1.) Drain your low water cutoff and drop your water level by a couple inches and refill (once a month)
2.) 2 weeks I to your heating season, have Cordts Plumbing perform a full flush on your system
3.) Make sure your radiator bleeders are bleeding properly. If there are radiators that don't get that hot any more, it may be time to replace them