Eucalyptus works indeed so well for sinuses ! I love it !
Today I washed with baking soda and ACV again - starting to get quite big knots, hehe - and I used Myrrh essential oil in the BS. According to my sources, it is antiviral, antiinfectious, antiparasitic, and good for irritated skin.
I added only 4 drops for a liter of water, and rinced thoroughly, but my hair still scent a lot like myrrh now. I so love the smell ! Was half a good idea though, because the oil formed some kind of small resinous "stones" in the bottle, didn't dissolve or disperse at all. I'll try to find a solution to that because I had to be extra careful not to let those "stones" get out of the bottle and tangle in my hair...