See smoke and smell burning from front of vehicle after it sits for days

What is your question?

I had the jeep serviced and the guy said that stuff was dripping on the sensor causing the burning smell and smoke. Said that I should take it to a Jeep Dealer and get repaired. When the vehicle sits for 2-3 days and then I drive it- the first 5 minutes it smells and when I stop I can see a little smoke coming from the front of the vehicle. This has been going on for 2 months.