Kuberako inganda zitandukanye zifite ibisabwa bitandukanye mugukoresha amabati ya pulasitike, ibicuruzwa bisanzwe ntibishobora guhaza ibyifuzo byabakiriya kubintu byihariye. Ibi bizaganisha ku gukoresha bidafite ishingiro no guta imyanda. Twongeyeho ibice byimikorere byashizweho ukurikije ibyo abakiriya bakeneye, kugirango ibicuruzwa birusheho guhuza nibyo abakiriya bakeneye.