I didn’t have any foam issues either mate. I had to submit my roaster because of a different issue within the roasting chamber. In all fairness Ikawa customer services were excellent!
Upon return of my roaster I discovered that the foam seemed to have been replaced. It was super clean (no chaff dust) and it it was slightly sticky on the glass for the first few roasts, like it was when new.
Anyway, I think there was definitely some tinkering aside from the hardware (foam). I think there has been some internal firmware tweaks, which seems to have caused a fluctuation of existing profile results, as well as app crashing (for me).
I am not certain on this…
…however what if there is a roaster age/roast session related number by which the heat probe will start to fall out of calibration by a few degrees? A firmware update could adjust this by means of an average/ predicted amount. Say (in both our cases after 18 months of roasting) the temperature probe starts to lose sensitivity & falsely record temperature lower than what it should be (eg. 250c instead of the actual 255c). An adjustment via a firmware update would mean our existing profiles are now effectively running cooler, producing lighter roasts, with less % moisture loss.
Perhaps Ikawa might want to consider letting some of us end-users into the loop, to assist in the ongoing R&D of the roaster?! That said perhaps Ikawa intentionally don’t disclose specific details, in an attempt to not influence our report findings; If we all knew what changes the firmware will introduce (e.g. the example above), Ikawa can’t accurately gauge the success of the changes when tested by us.
Whatever the reason, I used to really enjoy the nerdy updates supplied to us during the kickstarter campaign. I say bring them back! Yeh, sure, not everyone is going to want to know (or care) about the specifics of what Ikawa change in the app/roaster, but I for one do!