You'll need to spray with Disease Control, Traci. At this time of year, when most of the country is hot and humid, fungal and bacterial infections can be rampant. If you don't have any fans set up in your growing area, some extra air movement will help. Also, if you do any gardening where you might come into contact with pathogens on your outdoor plants, wash your hands before handling your orchids. Unfortunately there's no way to "fix" infected leaves without cutting away the diseased portion, but you can at least keep the infections from spreading.