Practise nurse peered into 3yo DS1s ears this week and said they're full of wax. Recommended putting warm olive oil in to loosen it, which I've been doing for a couple of days now, at night. I'm warming it in the microwave for a couple of seconds, then dropping it into his ear, using the calpol syringe, at bedtime. Is this the right thing to do? and how long will I have to wait until fat chunks of ear wax start to drop out