So I picked up a second hand lil bud Classic not long ago, and have been spending a bit of time getting to grips with it and I am somewhat enjoying it. However, I cannot seem to get the abv to a "dark coffee brown" colour like I can on other convection devices, and i dont think i could combust with it, even if i tried (12-15 second long, slow draws with button pressed the whole time). Now I am using older batteries, Hg2 and 25r, that have seen maybe a year of work with other devices. Do you think this could be the issue? I have new batteries on order to test this out, but outside of old batteries, what else can cause the device to run cool? Geographically speaking, returning the device to get fixed/looked at by the maker is not financially feasible, so just looking at possible things to look at if I have to open the device up to inspect. Thanks