Coronavirus (COVID-19) FAQ Cleaning and Sanitization Frequently Asked Questions

Coronavirus (COVID-19) Frequently Asked Question

The COVID-19 outbreak is an extremely serious situation that has impacted us all, and the situation is changing daily. Below we have put together some frequently asked question about cleaning and sanitizing to protect against the spread of infection. 

TLC is dedicated to providing rapid emergency response throughout South Eastern Massachusetts and staying on top of on the latest cleaning and sanitization methods. For the most up-to-date information we suggest you visit Massachusetts and CDC COVID-19 websites.

What’s the difference between cleaning, disinfecting and sanitizing?


Removes germs, dirt, and impurities from surfaces or objects. Cleaning works by using soap (or detergent) and water to physically remove germs from surfaces. This process does not necessarily kill germs, but by removing them, it lowers their numbers and the risk of spreading infection. 


Kills germs on surfaces or objects. Disinfecting works by using chemicals to kill germs on surfaces or objects. This process does not necessarily clean dirty surfaces or remove germs, but by killing germs on a surface after cleaning, it can further lower the risk of spreading infection.


It lowers the number of germs on surfaces or objects to a safe level, as judged by public health standards or requirements. This process works by either cleaning or disinfecting surfaces or objects to lower the risk of spreading infection.


Does TLC use a fogger? Sprayer? Mister?

Based on industry definitions and droplet size measurements, our sprayers deliver a consistent droplet size above 50 microns. This qualifies the system as a misting device. Due to the electrostatic charge of the droplets, as they leave the tip, the droplets are not suspended in the air. 


What is electrostatic spray technology?

Electrostatic phenomena is easily demonstrated when lint is attracted to clothes, or when dust clings to a TV screen. These descriptions are examples of Coulomb’s law which states that opposite electrical charges attract and like charges repel. Electrostatic spraying has been used for many decades in painting and agriculture. TLC uses this same process to apply a charge to the liquid droplets as they are formed and just before the droplets leave the spray nozzle. These “super-charged” droplets then actively seek out negative or neutral surfaces. As the droplets leave the nozzle, the charged droplets repel one another, keeping them from coming together and forming larger droplets.


Has the EPA evaluated electrostatic sprayers?

Yes. EPA studies (EPA-600-R-15-279 and USEPA 2015b) show that compared to traditional sprayer systems, an electrostatic spray technology is more efficient, reduces waste, and delivers a more uniform distribution of liquids over uneven surfaces.

What is the sprayer droplet size?

Our sprayers use a very specialized and precise spray tip. The tip produces an average droplet size or variable mean diameter of 85 microns (range of 54 microns to as large as 120 microns). With a VMD of 85 microns there is much less “drift”, better surface coverage, improved surface dwell time, and the least possible suspension of liquids.

How long do germs stay on surfaces?

SARS-CoV-2 can remain on surfaces for hours and up to 9 days. Research has shown that microorganisms can survive on surfaces for days, weeks, and even months, and can be hidden from current spray and wipe methods. (Kramer, 2006) Using electrostatic technology provides effective, proven, safe and comprehensive surface coverage and eliminates cross-contamination of dangerous pathogens.

Which disinfectants do you recommend for COVID-19?

We recommend the EPA’s list of disinfectants for use against SARS-CoV-2, the cause of COVID-19. The list can be reviewed here.

Contact us today to learn more