I want to do the same, to switch from liquid to foam. Because the liquid makes my hairs stick together and look thinner, it's also a pain in the *** to apply as it runs straight to my forehead/sides in a fraction of second.
Would switching to the foam cause shedding/not be effective?
I mention that i now currently use Spectral DNC, in my opinion it is more effective than usual Kirkland liquid, and also it makes my scalp very healthy(Kirkland used to give me rashes, red irritations and big flakes).But its texture is not so good when it comes to how hair looks after applying it. Kirkland was colorless.