Either smell in coach

First thing I'd do is disconnect the batteries. Prevents a fire and will help see if the smell goes away. Check under the coach for any leakage. A sweet smell could be your coolant/antifreeze. You're not using your coach as a meth lab right? Just had to ask. :B....hope you get an answer from the people who worked on your coach. Don't forget to ask them if they used chemicals on the slide fix.....Dennis