Unless they have mold or anything that requires deep deep cleaning, you can probably get away with a few wet cotton balls or q-tips to wipe down their faces and bodies- for any dust on the hair, you could brush down their hair with a wet (clean ofc) toothbrush rather than taking down their hair and scrubbing it with shampoo and conditioner- this is probably the best choice for WW Jade and the Boyz, since Jade has kanekalon hair which is notoriously difficult to work with and afaik the Boyz flocking is very sensitive to moisture and prone to peeling off.
For the plastic accessories and feet, I would just toss them in a bowl of lukewarm water and liquid dish soap, perhaps scrub them a bit and then leave them to air dry.
If the clothes are super dirty, you can also scrub them down with dish soap, rinse them off and leave them to dry- the only exception being the pleather clothing pieces because they are very fragile and prone to peeling- you'll want to wipe those down with a dry or slightly damp cloth, and leave them to air dry. Anything else might speed up the peeling.