I can't find anything on T888 yet, but if we assume it's a similar (super clean) product like BH209, you will require an oil based cleaner like Hoope's 9, or their Black Powder cleaner or the BH209 solvent.
Since BH209 cost me 50% more than the cost of T77 and the Firestick will cost about twice the cost of BH209 ..then yes that is a big difference. Seems that is not a game changer for some guys, but I find that the cost ($180) would be very limiting to enjoying an afternoon on the range.
no comment HaHa...