Whakamutua te rerenga e whai ake nei ki te kōwhiringa pai rawa: Hei whakaora i nga tipu mai i te pakiaka pirau.  Ngā kōwhiringa: - Whakamahia he wairewa waikawa waikawa 3% kotahi i te ra, ka pupuhi i te purapura i nga wa katoa ka whakainu ano koe. Ka taea hoki e koe te whakamahi i tētahi ranunga o ngā wāhanga 20 o te waikawa hāora ki ngā wāhanga 32 o te wai hei whakapai ake i te pūnaha pakiaka o ō tipu. - Whakamahia he wairewa waikawa waikawa 3% kotahi i te ra, ka pupuhi i te purapura i nga wa katoa ka whakainu ano koe. Ka taea hoki e koe te whakamahi i tētahi ranunga o te 1 wāhanga hydrogen peroxide ki te 32 wāhanga wai hei whakapai ake i te pūnaha pakiaka o ō tipu.  Whakautu:
Whakamahia he rongoā hauwai peroxide 3% kotahi i te ra, ka pupuhi i te purapura i nga wa katoa ka whakawai ano koe. Ka taea hoki e koe te whakamahi i tētahi ranunga o te 1 wāhanga hydrogen peroxide ki te 32 wāhanga wai hei whakapai ake i te pūnaha pakiaka o ō tipu.