If you use a 100-watt bulb, the glass isn't too thin. To clean off the inside where things have kinda stuck to the bulb, pour in a little salt and shake it/spin it around for a while. The inside may still look a little cloudy from resin build-up. Pour in a little rubbing alcohol and it will dissolve it. Just make sure you let all the alcohol evaporate after you've poured it out, since those fumes are pretty combustible! To be safe, you can rinse out the alcohol with water, but water take longer to evaporate.