| Here is our cleaning room |
| Ching-yee, you know, we are the experts of cleaning |
| Let me give you some practical tips |
| Cleaning should begin from the relatively clean areas first |
| then work towards the dirtier areas |
| Do you know why? |
| If you start from the dirty area, you will expand the size of it |
| So we should start from the cleaner area first |
| Then it would be more efficient and effective |
| All surfaces should be cleaned at least daily with detergent and water |
| or use disinfectant such as 1 : 99 diluted household bleach |
| (mixing 1 part of 5.25% bleach with 99 parts of water) when necessary |
| High touch areas should be cleaned more frequently, depending on the frequency of use |
| such as handrails of escalators, control panels of elevators and door knobs |
| Don't forget to wash your hands after completing the cleaning procedure |
| Pest control should also be carried out |
| Mosquitoes can transmit diseases like dengue fever and Japanese encephalitis |
| Places with stagnant water, such as saucers of flower pots, tree holes, water containers |
| keyholes on manhole covers, roof gutters and surface draining channels |
| must be cleaned regularly and kept dry to prevent breeding of vectors |
| Rodent control is also important |
| We would step up inspection, clear up debris and maintain sanitation |
| We would also install metal frames and deploy rodenticides, etc |
| And we, as management staff, should perform regular checks |
| to ensure strict enforcement of hygiene standards |
| What if there is visible dirt? |
| Gloves must be worn if the cleaning procedures involve contact with visible soils |
| Other PPE may be considered depending on the situation |
| When substantial amounts of body fluids or blood is anticipated |
| Eye protection, i.e. goggles or face shield, or body protection may be considered |
| Use highly absorbent material to clean up the contaminated surface first |
| If the surface is contaminated with vomitus |
| disinfect with 1 : 49 diluted household bleach |
| (mixing 1 part of 5.25% bleach with 49 parts of water) |
| rinse with water after 15 to 30 minutes |
| If the surface is contaminated with blood |
| use 1 : 4 diluted household bleach (mixing 1 part of 5.25% bleach with 4 parts of water) |
| to disinfect the contaminated surface, leave for 10 minutes before rinsing with water |
| Bleach plays a vital role in disinfection |
| It is a useful and effective household disinfectant |
| Its active ingredient, sodium hypochlorite |
| denatures the proteins of microorganisms |
| and is therefore effective in killing bacteria, fungi and viruses |
| Household bleach is widely available, at low cost and works quickly |
| Diluted household bleach is therefore recommended for the disinfection of facilities |
| However, bleach must be handled with caution |
| as bleach can irritate mucous membranes, skin and the airway |
| Improper use of bleach may lead to accidents and cause harms |
| Understood |
| Kit, please demonstrate the correct procedures of preparing and diluting bleach solution |
| Sure, I will go to prepare the tools and equipment |
| Thanks |
| First, we must ensure the environment is well-ventilated when diluting or using bleach |
| Window must be open if available |
| Good morning, Lin |
| Good morning, manager |
| Lin, property management assistant. Responsible for shopping centre cleaning |
| Kit, as Lin is here, please let her do the demonstration while you explain the steps |
| Sure |
| Okay. Let me demonstrate |
| Second, since bleach can irritate mucous membranes, skin and the airway |
| Protective equipment should be used when preparing and using bleach |
| Third, cold water should be used for dilution |
| as hot water decomposes the active ingredient of bleach and renders it ineffective |
| Fourth is the quantity and proportion |
| Household bleach contains 5.25% sodium hypochlorite |
| It is generally diluted in two ways |
| For general cleaning of the household area or high touch areas in shopping centres |
| such as escalator handrails, elevator control panels and door knobs |
| 1 : 99 diluted household bleach |
| (mixing 1 part of 5.25% bleach with 99 parts of water) can be used |
| but when it comes to surfaces contaminated with vomitus, excreta and secretions |
| A higher concentration of bleach with 1 : 49 diluted household bleach |
| (mixing 1 part of 5.25% bleach with 49 parts of water) should be used for disinfection |
| Fifth, measuring cup should be used for accurate measurement |
| 1 : 99 (mixing 1 part of 5.25% bleach with 99 parts of water), it is ready for use |
| Sixth, don't forget to rinse disinfected articles with water and wipe dry |
| Seventh, when you return here after disinfection is done |
| Soak all cleaning tools in diluted household bleach for 30 minutes |
| and rinse thoroughly before reuse next time |
| and finally, wash hands with liquid soap |
| Wipe your hands with clean towels or disposable towels |
| Moreover, a few important points to note when using diluted household bleach |
| Avoid using it on metals, wool, nylon, silk, dyed fabric and painted surfaces |
| Avoid touching the eyes |
| If bleach gets in the eyes, they must be washed for at least 15 minutes with water |
| and seek medical attention immediately afterwards |
| Do not mix bleach with other household cleaning agents |
| as this reduces its effectiveness in disinfection and can cause dangerous chemical reactions |
| For example, a toxic gas will be produced |
| when bleach is mixed with acidic agents such as toilet cleaner |
| This can result in accidents and injuries |
| If necessary, use detergents for cleaning first |
| and then rinse thoroughly with water before using bleach for disinfection |
| Undiluted bleach liberates a toxic gas when exposed to sunlight |
| Therefore we should store bleach in a cool, shaded place and keep it out of reach of children |
| To avoid accident, we usually perform the dilution of bleach in the cleaning room |
| Sodium hypochlorite decomposes with time |
| To ensure its effectiveness, purchase recently produced bleach and avoid overstock |
| For effective disinfection, use diluted bleach within 24 hours after preparation |
| as decomposition increases with time if left unused |
| Mr Fong, I have finished my work here |
| I will continue cleaning outside, please take your time |
| Thanks |