Be cool. Use your air conditioner correctly. Follow these suggestions for maximum comfort at minimum cost:
KEEP THE VENT KNOB "CLOSED" AT ALL TIMES. If the vent knob is set to "open", your air conditioner is constantly cooling hot outside air. It will not be able to cool your apartment and will seem to be not working. Keep the vent "closed" so the air conditioner is re-cooling inside apartment air. It will also cost less than half.
GET RID OF EXCESS HUMIDITY IN YOUR APARTMENT. Ice forms on your air conditioner coils when the relative humidity inside your apartment is greater than the relative humidity outside. The extra water vapor in the air condenses on the air conditioner coils and then turns to ice. The air conditioner will not work at all. If this happens, turn the air conditioner off and wait until the next day for all the ice to melt. To prevent this from happening again, equalize the humidity by opening the windows and/or patio door for an hour or so before you turn the air conditioner back on again.
DON'T TRY TO "CHILL DOWN" YOUR APARTMENT EVERY DAY. Your electrical cost for the air conditioner will be much lower if you set your air conditioner to run continuously at a constant, comfortable temperature.
KEEP THE WINDOWS COVERED. If you have uncovered windows, your air conditioning is totally and quickly destroyed. Your apartment becomes a greenhouse. Keep the sunlight out and keep the incandescent lighting Iow. Each light bulb adds significant heat to your apartment (not so much the kitchen ceiling light, which is fluorescent).
KEEP THE DOORS AND WINDOWS CLOSED. RUN THE BATHROOM FAN DURING EVERY SHOWER AND FOR 30 MINUTES AFTER. RUN THE BATHROOM FAN WHILE YOU ARE COOKING. Your apartment will feel cooler if it is also DRY.
DO NOT REMOVE THE AIR CONDITIONER COVER FOR ANY REASON. If you break it, you buy it
Now, after all this, don't be afraid to use your air conditioner. DO use it. It doesn't cost that much. Just use it correctly, and you will be more comfortable at less cost.