Vibrators and harmful substances?

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If you buy a vibrator made of soft material like jelly then I guess it's usually not safe because of harmful substances right?
I also read that many vibs simply smell chemical. In such a case what could one do? Put a condom over it or would a latex glove also work? And where do you get latex gloves which aren't for the kitchen but for examination?

Cmon tony.. haven't we been through all this nonsense before?