93 850 GLT won't start?!

[Guest]

I just got this car a few weeks ago, It was garage kept by its first and only owner and only had 70,000 miles on it. Amazing car for its age and everything has ran fine. Well I had the car washed today and they washed the engine also cuz it has gotten really messy over the years and looks to not been done in a long while. They finished and I went to start the car and it wont start?! Theres power, it turns over but it wont start whats happened? Bad idea to have the engine cleaned? Volvos are kinda new to me, been in chevys / gmc all my life so yea I'm stupid here. Help!?

Thanks
Stupid 850 Owner