How to vape indoors without being detected

Hello,

as I am always freezing I need to find ways to use vapes indoors without anyone becoming suspicious.

The problem is, that I have no experience with bases, mixing and shots; otherwise I would use nicotine shots. Are there brands that offer shots that can be used without having to add anything?

Another idea would be menthol flavours, as it is an essential oil, and I could say that I have to use these essential oils against my headaches (I have a chronic migraine). The problem is, that I don't like it.

Perhaps it would also work to use a very weak flavour; but here I don't know which one I could use, or which brand.

Do you have suggestions or advice? How do you do it? What is your experience?

Thanks so much for your (please only constructive) advice!