1QwkSport2.5r - Sometimes the glow fuel gets exposed to a little bit of sun, but its usually dark or just artificial light from light bulbs. The glo driver has a rechargeable NiCD battery built in...its the hobbico glo start. I don't have a glow plug to test it on.
t-max97 - It doesn't look like theres any water build up in there, but I guess you can't see that? I do not have a glow plug, but I do have a voltage meter...how would I use that to test it?