K9III dryer. Make sure wherever you plug it in is wired for 20amp.
Zymox is beyond miraculous for ears.
http://www.amazon.com/Pet-King-Enzymatic-Solution-Ounces/dp/B0025YOJXS
For skin, dry hair, keep dry and fluffed, part and comb out crusties.
Have tried all kinds of sprays and lotions. Also the Gold Bond, but once Orka got loopy and strange, called Poison Control, found out Gold Bond is toxic if they lick it.
Best thing I've found for hot spots is the inflatable donut ring to put around neck to prevent fussing licking and worrying the hot spot.
Orka swim in rivers / lakes almost every day and night, drips dry. The hot spots come with allergies and not from water in his case. He has environmental allergies -- molds, pollen, grasses -- which of course blanket PacNW. Comb every day, use dryer, use donut if he's licking, taught "Leave that alone."
The hot spots dry and heal. I do watch to make sure they don't spread or get hot and red or turn into infections.