The day before yesterday, when I opened the hood of my car, I noticed some fluid on the top of the lower engine cover. I drove a few kilometers and found that the fluid had dried without leaving any trace. A few hours earlier, I had washed my car in an automatic car wash.
The same thing happened today, but I didn't wash the car; it rained overnight. Is it possible that the automatic car wash and the rainfall caused water to accumulate there?
Does this happen in your cars ?