I am a bit confused here. What do you mean by "inside the bulb"? The inside of a strobe or any light bulb is usually a vacuum or filled with something that is not the nitrogen/oxygen/COx mixture we breathe. That is what keep the bulb from burning out in 2 seconds.

Or do you mean something ON the strobe itself? If that is the case, then I would definately look at cleaning it with alcohol since the uneven rate of heating the carbon gunk would cause could pop the bulb. Be sure to not leave ANY fingerprints though, because even the oil on your hands can be bad.