Girls, please tell me who does what inhalations for kids with coughs and…

Girls, please tell me who does what inhalations for kids with coughs and runny noses? We're doing Borjomi now, it seems okay, but I would like to know more, what other options are there? Do we need to heat up the solution before inhalation? For example, mineral water? Where do they write that, and the doctor didn't say anything. It turns out the child is getting an inhalation with cold air... Tell me about your experience. Thanks ??