Why doesn't this fungicide come out in a fine spray that covers the whole leaf?

I think some, maybe all, of my house plants have some sort of fungus, so I had Rick pick up a fungicide. I sprayed it first on a plant that I could stand to lose, if I HAD to lose one, to see how it reacted before I spray the rest.
However, the fungicide just comes out in big blobs and sticks on random places on the leaves. I guess I need to rub it in with something, which is counter intuitive because you aren’t supposed to come into contact with it, but I don’t know how else to cover the leaves.

Also, they put foil over ketchup and mustard and every kind of food there is, so you have to take the lid off and remove the foil before you can use it….BUT THERE ARE NO SUCH SAFE GUARDS ON THE DAMN FUNGICIDE! I picked it up from the back deck, where Rick had left it, and it’s live! It’s ready to go! Glad I didn’t have any grand kids over before I got to it.