https://www.cdc.gov/mmwr/volumes/69/wr/mm6912e3.htm?s_cid=mm6912e3_e&deliveryName=USCDC_921-DM23553
In terms of how long this Virus lives on surfaces, the fog of war has cleared a little more. The American Center for Disease Control has now found COVID-19, 17 days after the last tourist left their Cruise Ships room but before it was cleaned. It looks like some of the earlier estimates by the CDC and respected Universities etc. were overly optimistic. I thought that If I did not touch things for one to two weeks I would be safe with out using bleach or 70% or better alcohol. I am thinking that if I want to be safe now with out using sanitizers on possible exposed surfaces, that they should not be touched for 30 days to provide a safety factor. This virus continues to surprise, and not in a good way.
Going to jump in here and clear up a few things. My first degree is in Biochemistry / Microbiology; my wife wrote her masters in Virology (in a lab that contributed to sequencing the SARS genome) and has worked in public health, research institutions including level 3 biosafety laboratories, and big pharma. I'm not pretending to be an expert in coronavirus or COVID-19, but there is some basic stuff that I think people should understand about what we are facing in order to make better decisions - and just stay sane.
The paper does not say that SARS-CoV-2 (CoV) remains infectious for up to 17 day on surfaces. The "What is added by this report" states: "...Transmission occurred across multiple voyages from ship to ship
by crew members; both crew members and passengers were affected..." - that's the key takeaway. What they found was RNA on untreated surfaces. RNA is the genetic material for the CoV virus and frankly it is not surprising that it would be found. This does not mean that there is viable virus present capable of causing infection. It is analogous to finding a suspect's DNA at a crime scene - doesn't mean they are still there in the room ready to commit another crime. The RNA by itself is not capable of causing infection.
(Also, virus don't "live" anywhere and you don't "kill" them. They are not living organism in that they cannot reproduce on their own. They have to highjack another cell's machinery in order to reproduce. Referring to them as living is like calling whales fish, although whales and fish (or whales and bacteria for that matter) have more in common with each other than viruses to even the most basic single celled organism.)
The reports of the virus being infectious on different surfaces for up to three days are misleading if not fully understood. Yes, they have been able to find - under laboratory conditions - viable virus after several days, but most virus particles that were placed on the surfaces have broken down and are no longer infectious. It is not clear even if the number of virus that were placed on the surface are is comparable to what would be found naturally (i.e. someone coughing in their hand and touching a handle), or if the number of viable virus at the end of the time periods they are quoting would be sufficient to cause infection. No need to leave your groceries sitting for several days when you get home. Put them away and wash your hands after.
Don't try using your Instant Pot (or similar) "sterilization" cycle and think you are in the clear - it doesn't generate sufficient pressure to properly sterilize items (an old school pressure cooker will reach sufficient pressure). A medical autoclave also displaces the air in the chamber with steam to achieve proper sterilization. The best way to clean items you are concerned about is to wash with either soap and water, a solution with at least 70% ethanol, or a bleach solution (not full strength). And the best way to avoid being infected is to wash your hands with soap (doesn't have to be "anti-bacterial"), practice social distancing, wash your hands, don't touch your face, and wash your hands. Hand sanitizer is ok if needed, but washing your hands properly is better. Gloves and face masks can actually increase your risk of getting infected if you haven't been trained in their use and don't practice proper techniques in donning and removing, and they can create bad habits through instilling a false sense of security.
Remember that "flattening the curve" means spreading out the period of the outbreak - it doesn't mean eliminating the chance of getting sick. The way things are going with the virus firmly established in the population, there's a good probability that things won't return to normal until 70%+ of the population has had it and herd immunity is developed. The goal with flattening the curve is not to overload the health care system at one time in order than the system can keep things manageable. So be prepared that the changes you make to your daily habits are going to be with your for a while - months if not longer - so they should be things that are easy to live with. Again washing your hands, social distancing and not touching your face are the most important things you can do; trying to go above and beyond with elaborate systems is going to produce diminishing or potentially even negative returns and could be untenable. And if you get sick, self isolate; it is way easier to avoid spreading the disease than it is to avoid catching it.
And think critically and look for a second opinions on anything you read and have questions about by sticking the proper authorities - Health Canada, WHO, CDC, etc. What we are going through is unprecedented and everyone is looking for answers that in a lot of cases are just not there (vaccines, miracle drugs, ibuprofen makes it worse, etc.) which creates the perfect situation for misinformation to spread. Fortunately for the vast majority of people a case of COVID-19 will be relatively mild and we are not dealing with something more virulent. Stay safe, stay healthy and stay sane.