Nissan xterra 2011. As title states, i drove my car recently and used my wipers to wash off bird shit and i started to smell coolant. I got worried but as it stopped squirting wiper fluid it stopped. I opened my hood to check if the bay smelled of it and look for obvious leaks and found nothing. I checked the road where i parked the next morning and i found nothing dripping underneath. I then tried every combination of heat, ac, only fan, rear wipers, etc, and it only happens when i use the front wipers with wiper fluid. Whats happening?