vegetable glycerin, which is used to create the mist or smoke effect, is generally considered safe for humans. However, I noticed that prolonged exposure or ingestion may have different effects, so it's always wise to follow the instructions provided by the manufacturer.
Regarding the mist's impact on electronics like your PC and TV, it's unlikely to cause direct harm, such as conductivity or corrosion. The mist generated by the toy is typically water-based and should evaporate without leaving behind any residue. However, it's advisable to keep a safe distance between the mist and your electronics to minimize any potential risks.
As for the composition of the mist, it's difficult to provide specific details without referring to the product's official documentation or contacting the manufacturer directly. The mist is generally a combination of water vapor and other substances that create the visual effect. While it may have a sweet taste and feel sticky inside the machine, the mist itself should be primarily water vapor and not contain harmful chemicals.