It must be in the air, I did a simmer pot yesterday evening! 
On my stovetop, I put (x) amount of water
(y) Rosemary
(y) Fresh lemon shavings
(y) Whole Cloves
(y) Spearmint
(y) Rose Petals
(y) Star Anise & a few seeds
(z) Lavender
I turned it on to simmer and when the water level goes down over time, I just grab (x) of water and fill it up.
I’ve heard of people actually saving it after the first use but that’s about all, no clue as to why or how it’s kept and if there are any other uses besides the stovetop.
I’m digging your combinations you have up there. I seem to always gravitate to the same herbs and spices, etc., so thank you for giving me a reason to step outta my box lol!
Oh yeah, (x) = unmeasured
(y) handful of this or sprinkle of that
(z) only a pinch
LOL 