Sometimes it takes a couple of tank fulls of ejuice for the flavor to really start coming through. Give them a little while to see if that happens for you. In the meantime, just keep using your k kiss.
I am not too familiar with the mods you own, so are the new ones capable of vw changing? That is also where you can dial your flavor in. Sometimes ejuice can taste better in one tank and not so good in another/different one. Maybe a different flavor can be used in the newer tank for variety/taste? Or backup is good also. I know that some of my ejuice taste terrible at higher temperature and great at lower ones and vis versa.
I am not too familiar with the mods you own, so are the new ones capable of vw changing? That is also where you can dial your flavor in. Sometimes ejuice can taste better in one tank and not so good in another/different one. Maybe a different flavor can be used in the newer tank for variety/taste? Or backup is good also. I know that some of my ejuice taste terrible at higher temperature and great at lower ones and vis versa.