Fog lights protection

glass, protection, happening, guys, use/recommend, http://uploads.tapatalk-cdn.com/20160315/d5c99932e14f0d85ecc243bd88aaa74f.jpg, plastic, light, lights, glasses, replaced, rock, shattered, damn, prevent

So one of my fog light glasses just shattered. Damn rock... Replaced the glass and I want to prevent it from happening again. Do you guys use/recommend any plastic protection or something to put on the glass ? Thanks http://uploads.tapatalk-cdn.com/20160315/d5c99932e14f0d85ecc243bd88aaa74f.jpg