Mask ke e 'ngoe ea lihlahisoa tse tloaelehileng tsa tlhokomelo ea letlalo bophelong.Lihlahisoa tse kentsoeng ho eona li kopana le letlalo, kahoo hoa hlokahala ho thibela ho senyeha, ho thibela oxidation, le ho boloka sehlahisoa se le secha le se feletseng ka nako e telele kamoo ho ka khonehang.Ka hona, litlhoko tsa mekotla ea ho paka le tsona li betere.Re na le lilemo tse fetang 30 tsa boiphihlelo ba ho sebetsa ka liphutheloana tse feto-fetohang.