On Tuesday, 5 May 2020 12:05:30 UTC+1, tim... wrote:

Citric acid has long been on my list of items that I want in my cupboard as
cheap generic scale remover, because I don't like the smell of vinegar

but I have never (since about 1970) seen anywhere openly selling it,

so no, I don't have some in my cupboards (I just suffer the smell of the
vinegar)

Chemists, online or shops that sell big bags of spices. AIUI it's mainly bought by drug injectors, so funny attitudes are always possible.

Rinse-aid is hardly essential.


NT