Handling
Halogen bulbs can be weakened or damaged by the oils on your skin and many other contaminants, so it is important to only handle halogen bulbs while wearing clean, disposable gloves. Keep bulbs in the original packaging until use.
Cleaning
If you do accidentally touch or otherwise dirty a bulb, it's best to clean it using a light solvent such as alcohol and a clean, lint-free rag.
Inspecting
Regularly check bulbs for debris or buildup, as some print media can stick to bulbs and shorten their life. When changing bulbs, check the ceramic socket and contact for damage or corrosion, and clean or replace them if necessary.
Voltage
Halogen bulbs are very sensitive to changes in voltage. Be aware of the effects this can have on bulb life.
Chemicals
Contact cleaners remove dirt, dust and oil from electrical contacts and have no flash point. Rubbing alcohol is safe to use on the quartz tube of the lamp.
Replacement
Replace bulbs when they are damaged, burnt out, or become excessively cloudy. Always replace bulbs with those of the proper voltage and wattage.