It is not that difficult to clean. The fungus spots should be dealt with because these can spread across the optics. Cleaning the corrector is the easier than the mirror. Some minor streaks on the mirror will not affect your viewing. Most likely some dew drops made there way inside the tube and fell on the mirror. If you are not game to try the task speak with Bintel
This video is more appropriate to your scope:
https://www.youtube.com/watch?v=e66yIuD3cMk