Hello - I'm a first time plant novice - I bought a kentia palm in December from b&q - stuck it in our shady North facing living room (away from the window) watered it as instructed every two weeks sparingly. When we bought it - it had a few yellow spots now its covered in them. I've tried googling to no avail. I've moved the plant to our bathroom too see if the humidity helps but can any plnt expertis shed any light please?