I HAVE BLACK SPOTS ON A COUPLE OF THE GREEN LEAVES ON 2 OR 3 OF MY ORCHID PLANTS. IS THERE A WAY I CAN TREAT THESE BLACK SPOTS? OR SHOULD I JUST CUT OFF THE LEAVES WITH THE SPOTS? I DON'T KNOW WHAT TO DO1 HELP!! I DON'T WANT TO HURT MY PLANTS IN ANY WAY. THANK YOU, CHET AND GAYLYN