New to vaping and this device, but I get the general idea. Need advice on initial use of X. The package had a couple of oblong items separately bagged: thin mesh screen, metal screen with small holes at one end, and a thicker spun metal (?) sponge. The first two look like spare replacements for the items in the mouthpiece. But does the sponge go inside the chamber BEFORE i put bud in? Or what? Thanks.