A cleanroom is an environment, typically used in manufacturing or scientific research, that has a low level of environmental pollutants such as dust, airborne microbes, aerosol particles and chemical vapors. If you have been asked to work in one, you’ll need to take the appropriate steps to avoid introducing contamination.
There is no single type of cleanroom or single set of rules for entering, so make sure to get training and instruction for the particular cleanroom you will enter.

Steps
Fine circuitry is easily damaged.Understand the purpose of cleanroom protocol. Processes require cleanrooms because any speck of dust can damage the processes that occur inside them. Physical contaminants include skin cells that flake off, dandruff, clothing fibers, and loose hair. Paper, pencils, packaging materials, and many other things shed dust, and even tiny particles can damage the delicate products built and tested in cleanrooms.
Know what class of cleanroom you’re entering. There are a couple of different sets of standards, but in general, the lower the number, the cleaner the cleanroom.
Recognize that humans are generally the single largest source of contamination within a cleanroom.

Bouffant caps and smocks.Follow the instructions given by your employer or whoever operates and maintains the cleanroom. Cleanroom apparel varies. It may consist of gloves, a cap, and smock at its most basic all the way up to a full “bunny suit”. These are general instructions.
Shower in the morning on any day you will enter a cleanroom.

Powder = particles.Do not wear cosmetics, hair spray, perfumes, or colognes into a cleanroom.
Wear appropriate attire under your cleanroom garb. Skirts, high-heeled shoes, shorts, and in some cases, short-sleeved shirts are not appropriate attire. Also steer clear of clothing that is especially fuzzy or tends to produce a lot of lint or static electricity.
Clean your shoes on the way in.
If there is a machine at the door for this purpose (spinning brushes), use it. Place your foot and shoe together inside it. Hold the handle to steady yourself, then press the button. You’ll feel a slight tug on your shoe from the moving brushes, but it won’t damage your shoe.
If there is an adhesive doormat, step on it several times.
Stow personal items you won’t be taking into the cleanroom. Leave them at your desk or use lockers, if they are provided.
Discard candy, gum, or anything else in your mouth.
Put on a hair cover (bouffant cap) and/or hood. Use a beard cover to cover any facial hair (beard or mustache).
Put on shoe covers or booties.

An inspection process with hoods and coveralls.Put on coveralls or a smock. Zip or snap it closed all the way up, over the neck of the hood if you are wearing one. Close any snaps at the cuffs to gather the sleeves snugly around your wrists.
Put on safety glasses, goggles, or a face shield, and hearing protection, as required.
Put on latex gloves, or the appropriate substitute for those allergic to latex.
Pass through the air shower if there is one and step on any additional adhesive mats as you enter.

A wafer handler.Keep cleanroom protocol in mind whenever you work within a cleanroom.
Keep your cleanroom apparel on at all times when working in the cleanroom.
Do not bring in any of the following items: pencils (note that graphite is conductive), erasers, non-cleanroom paper, wood, abrasives, or packaging materials such as cardboard. Keep non-cleanroom paper in a plastic sleeve if you must refer to it. Use only cleanroom tape. Be aware of what else you bring in.
Correctly wipe down any equipment you bring in. Do not remove cleanroom equipment from a cleanroom.
Move slowly and evenly. Rapid, sudden, or jerky movements can shed many particles.

NASA workers in bunny suits (coveralls).Replace any cleanroom attire that is worn or soiled. Even cleanroom apparel gets dirty as you wear it and work in it. If it has been a while, make sure you have yours cleaned and get a fresh one.
Use fresh gloves, hair covers, and disposable shoe covers every time you enter.
You can reuse smocks, coveralls, reusable shoe covers, and reusable caps or hoods, but exchange or have them cleaned periodically.
Remove cleanroom attire in the opposite order from that in which you donned it. Remove cleanroom attire each time you leave the cleanroom. Do not exit the cleanroom wearing or carrying cleanroom attire. Put it on each time you enter and take it off and store it correctly each time you leave.

Tips

Understand any safety issues involved in working in a cleanroom. There may be hazardous materials, heavy equipment, high temperatures, sharp objects, tight spaces, and high voltage. If you are working alongside any of these or other hazards, be sure you are properly trained for them. Understand and follow the proper precautions.
Never eat, drink, or smoke in a cleanroom.

Now aren’t you glad you don’t have to even ENTER a clean room, much less, get one to this level of perfection! Thank you Lord for my own imperfection especially where housework goes. I wouldn’t have any friends left at all. Happy Friday!