It's possible, sometimes when fluid or water gets between the belt and pulleys the pulleys can spin under the belt causing the ribs to get deeper then normal. If its only been a short time this may not be an issue. I would clean the belt up and try it, if the belt is damaged it will likely make some noise, maybe not right away though. Belts don't cost a lot, I would suggest changing it to avoid any issue at all. Just my opinion though.