Good Evening! I am not sure of the age of my oven (Frigidaire RE-94 model) as I inherited it when I moved into my home. In any case, last evening, after I used it with no problem, I noticed that a piece of the glass shield that covers the light bulb was broken. In investigating this evening, I found that the entire shield was cracked in several places. So, does anyone know if this is a common part that I can replace? Is it okay to use the oven without the protective shield? It obviously wouldn't be too appealing to find bits of light bulb glass in my food! Thank you!