Bought this "Nextplus" unscented aircon spray for my Japanese ceiling a/c units (which are terribly designed breeding grounds for black mold). The spray stunk up my entire home for weeks and gave me a constant metallic taste in my mouth. Returned the spray to the store a few weeks later (yes, you can return things in Japan; the store employees usually just act dumbfounded because Japanese people typically keep the cheap products and suffer). Putting this advice on here to forgo this terrible, nasty-smelling chemical spray! Just use diluted bleach (0.5%) or vinegar instead to spray your a/c evaporator coils. It works better, kills the mold, and the smell goes away in a day. Then put some drain pan tablets in to keep it clean. You can but those on US Amazon but for some reason they don't even sell them in Japanese hardware stores.
by Puzzled_Plenty_9276