A few new results of oxidation wall conditionings for deposits removal and hydrogen release were directly obtained on exposure of co-deposited films to O-ICR or O-GDC plasmas in HT-7. After the O-ICR or O-GDC treatments, the deposits were partially removed and deuterium retention was reduced. D2 release from samples was reduced by a factor of 2–3, and the ratio of D/C decreased whereas that of O/C increased. The removal rates of C in various oxidation wall conditionings were about 1018–1019C m−2 min−1, which approached the estimated carbon deposited rates, of about 5.2 × 1018C m−2 min−1, on the tested samples. The He/O-ICR was more effective on the deposits removal and hydrogen (deuterium) release than O-GDC. And O-ICR was more effective on the surface facing main plasma than on that facing SOL plasma, whereas O-GDC possibly has uniform effectivity on both tested surfaces.