What would a person do if sweat has washed off the date codes on their helmets? (EPS liner sticker). I've this predicament. It's my 1st weekend and I just checked my helmets - voila! They've disappeared. On all 3 of them! Can WERA run the model/ year of production? (2 are Suomy SR sport; 1 is Arai corsair X. The specific models haven’t been in production for > 2-3 years). Any input is much appreciated.