I do sometimes put Lavender oil on the radiators but don't have the heating on much, do you need to heat up these oils or anything ?, will have a google
Yeah you need to heat them up, the basic way is to buy one of these, and some 'tea lights'.
Put water in the top bit, and a few drops of oil (you don't need much) something like this:
Its best to get one that has a removable bowl for cleaning.
The little tea light warms up the water enough to evaporate and vaporise the few drops of oil you've put in.
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