Hey, good job on day 5. How long are you planning to go?
I can't say exactly what the strange taste it, I think we all get it though. I think it's just a large combination of different things. Make sure you're getting plenty of water.
Oil pulling might help. I'm not sure if it stimulates digestion or not, so someone might want to correct me, if I'm wrong. I know some people prefer not to oil pull on the MC, but I've never had a problem with it. I'd go with coconut oil. It would also be a great counter attack on the acidity of the lemons. I'd probably suggest a small glass of water first think upon waking, brush with just water, oil pull, then SWF...will also help pull toxins out quicker. Also make sure to brush your tongue...a tongue scraper might even help.