Sorry for your loss, but everything is a Lemming Learning experience!
I would start with an ammonia based Windex type cleaner, OR 99% IPA (not at same time, always rinse well between applications) use rubber gloves & soft toothbrush.
In the US you have the option of Simple Green, which is effective & slightly less caustic than the oven cleaners.
The 'Mr Muscle' or 'Fairy Power Spray' type Oven Cleaners...
are the Nuke Option, are pretty drastic, are fatal to transparent Canopies, will loosen superglue.... but work.
Avoid Brake Fluid, it turns Italeri plastic into mush...
Good luck