There are additional cleaning methods such as steam cleaning (heat breaks the virus down), Ozone, Aqueous Ozone, UV light, fogging (dry or thermal) that may be appropriate to engage for common areas or high use zones, however the risk to both guests and cleaners as well as the cost would need to be assessed. Properties need to be cleaned AND disinfected.
• Steam Cleaning: Within the steamer, heat is used to transform a single litre of tap water to over 1700 litres of steam, which is enough to clean a small apartment. Because you are only using tap water, you are not leaving behind any chemical residue that may be harmful to guests especially those with allergies. The steam also binds dust together and removes it rather than emitting any allergens and therefore it also improves the air quality. The official UK Government advice is to steam clean your upholstery and fabric furnishings to prevent the spread of the coronavirus.
● UV Light: UV-C Lights use short wave ultraviolet radiation. The light penetrates the outer structure of the cell and alters the DNA molecule preventing it from replication and causing cell death. It has been used since the 1880s to kill micro-organisms and has been used to successfully kill a range of viruses, bacteria and organisms including: Coronavirus, Ebola, MRSA, Salmonella, E-Coli, Fleas, dust mites and Pneumonia. It has a kill rate of 99.99% (Log 4). Lights can be set up in rooms and left for a set time (timer on the appliance) and the room can be vacated while in operation, or there is hand held UV lights commonly known as ‘wands’ that can be swiped over surfaces to ensure all living cells are destroyed. Pros are that it can be used in a variety of settings and is safe for use, however you must remember that light travels in straight lines and it won’t get into folds in curtains or into hidden cracks.
● Gaseous Ozone: Gaseous ozone is emitted from an ozone generator in a sealed space. The room must be absolutely clear of any living things including pets, plants, people and sealed while the generator is in action. The ozone generator draws in Oxygen from the air, converts it to and then emits Ozone (O3). Ozone is very effective in cleaning air, and a number of people use ozone generators to get rid of unpleasant smells. It’s kill rate on SARS-CoV-2 is still under investigation, but may be no better than 99.22%. After an ozone generator has finished, the room must be left for a certain time to ensure the ozone breaks down before anyone can enter.
● Aqueous Ozone: A stabilised form of Ozone suspended in water for up to 24 hours. Essentially it is a powerful cleaning and disinfecting product that consists of water, oxygen and electricity. A powerful charge is pushed through the water to change the structure. The O2 in water become O3 (oxone). This is a powerful cleaning agent, and after 24 hours the O3 has returned to O2 making it perfectly safe to throw out down the plug as normal tap water. It can be used to pre-disinfect, clean and disinfect, so is a multi-purpose item, however it has not yet been fully tested on SAR-CoV-2. It has been found to be 99.99% (Log-4) effective on a nearest similar virus
● Ultra Low Volume (ULV) Fogging: this is the use of machines that push out disinfectant in a fine mist to cover all surfaces, because the mist is pushed out under pressure the disinfectant spreads across a wide area and can get into hard to reach areas. However, on the down side you have to prepare you space well, cover all fire alarms and electrical appliances and ensure no one enters the room during and after the fogging until the appropriate time has passed. Operators must wear full protective clothing and be well trained on both the equipment and the chemicals they are using.