Mine usually takes a while to seep- change color and get some flavor. It’s not particularly strong. But if it’s not doing anything, I don’t know what’s wrong. I know there’s inner bark and outer bark (don’t know the difference, just noticed the label).
Lyme, Babesia, Bartonella. Symptoms began 5/2016, didn't start treatment until 9/2016. Slow but steady recovery.