What is cleaning: Definition and 69 Discussions

Cleaning is the process of removing unwanted substances, such as dirt, infectious agents, and other impurities, from an object or environment. Cleaning is often performed for aesthetic, hygienic, functional, environmental, or safety purposes. Cleaning occurs in many different contexts, and uses many different methods. Several occupations are devoted to cleaning.

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  1. wolram

    Where Does All the Carbon Come From? Tips for Easier Cooker Cleaning

    These things are the hardest things ever to keep clean, where does all the carbon come from? I sure hate cooker cleaning.
  2. D

    Cleaning Viewing Ports on a Magnetron System

    I am currently usig a dc magnetron system to produce thin films on various different ypes of substrate, my problem is, the main viewing port (around 8" diameter) keeps getting a build up of thin film on it, effectively turning it into a mirror; this happens every time a sputter making it...
  3. J

    MATLAB Clean Wave File Impulse Noise with Matlab

    I'm attempting to clean impulse noise from a wave file in matlab. the file is two channels, about 7 million points in each channel. What I wish to do is keep points, that are below my trigger levels, and delete points (in both channels simultaneously) that are above the trigger levels for either...
  4. M

    Differential equations-system of equations, cleaning up the great lakes

    Homework Statement The idea of the problem is to find out how long it would take to flush the Great Lakes of pollution. They're set up as a series of five tanks and you are given inflow rates of clean water, inflow rates from the other tanks, and outflow rates. See attached figure...
  5. M

    Cleaning Bottles with Ultrasound

    A mate of mine who has a hobby involving digging up old bottles (and other items) from old rubbish dumps, came across instructions for cleaning the bottles with ultrasound. The instructions he showed me involved using a metal tank, signal generator set to 40kHz and a 'transducer'. I...
  6. ShawnD

    My cleaning solution changes color when I distill it

    I made a cleaning solution that could clean anything. It was made from: -1L of 5% bleach (normal stuff at any store) -3L of 70% isopropyl alcohol -1/2 cup of dish soap -a dash of Comet -1 tablespoon of concentrated ammonia The solution would settle out as a cloudy yellow mixture. When...
  7. M

    What material is best for cleaning an oil spill

    I am doing a science project to determine what material is best at cleaning up an oil spill in the ocean. I plan to simulate the ocean and use motor oil. I am trying to do something similar to Exxon Valdes
  8. H

    Exploring Environmental and Chemical Cleaning Advances

    I need help with the following problems: 1.Are there environmental concerns that arise as a result of the chemical process of cleaning?(if yes go into details) 2. Has the cleaning industry made any recent advances that have chemical foundations(if yes go into details) Websites, Answers...
  9. H

    What Are the Key Chemicals Involved in Cleaning and How Do They Work?

    I am in an on-line chemistry class and I am having trouble figuring out Chemical reactions upon which Cleaning relies on and the role that it plays in the cleaning industry?:confused: Can somebody please help me I think it is: Water Soaps Fats and Oils Alkali ...but I'm not really sure
  10. M

    Cleaning Brazed Plate Heat Exchanger

    Is there a way to chemically clean this type of exchanger from graphite impurities (tiny particles) ? is possible to chemically remove coke,soot,graphite at all? we clean it with xylene but that doesn't help tnx
  11. A

    Cleaning a Cloudy Patch Inside Orion 120mm Telescope Lens

    I own an Orion 120mm f\5 600mm telescope . I bought it last year from Orion . I recently noticed a cloudy patch about 2in. round on the inside of the scope on the lens , it looks like condensation to me . I've always been careful when i bring the scope in the house fron the nights cold air and...
  12. Math Is Hard

    Cleaning Laptop Screen: What to Use?

    I need to clean my laptop screen but I am not sure what to use. Any recommendations? thanks.
  13. wolram

    Klutz Alert: Cleaning Up the Mess at Home

    I have just got home from a sh** ty night, and i know i am a household klutz but i do like every thing to be clean and tidy, and every thing is covered in soot, even my lap top has soot on it, my chairs my electric fire every thing :cry: :cry: how the heck can i clean this lot up.
  14. DaveC426913

    How can I fix my dishwasher not cleaning properly?

    I've had this GE dishwasher for a couple of years, and things have been fine. A few months ago, it started leaving dishes dirty. I can't figure out why. By "dirty", I mean the dishes (mostly the glasses in the top rack) are coming out with crumbly gunk stuck to them (basically baked-on from...
  15. z-component

    Cleaning the Dust Out of My PC - A Year Later

    Today I decided to open up my PC's case and de-dust it. I usually do it once every 4-5 months but I've been putting it off and before today I hadn't done it for over a year... :uhh: It took me about 20 minutes to clean all the dust out, starting with the main fan, the dust case around the...
  16. B

    Uncovering the Chemistry of a Cleaning Agent

    While washing my bathroom sink, I read that the main ingredient of the cleaner I used was none other than "sodium dichloro-s-triazinetrione dihydrate" Is the structure of this compound simply: -1,3,5 triazinetrione with two hydrogens replaced with chlorine, and the third hydrogen replaced...
  17. S

    Cleaning a reflector mirror without scratching it

    Hi all. I have a very heavy 9" reflector but it is has spherical curve. It was made for a semiconductor projection aligner which was being scrapped and I saved the mirror from going into the trash bin. I saw an article in one of the rags about making a frame on the back of the mirror where...
  18. mattmns

    Cleaning Battery Acid from a Microsoft Wireless Mouse

    I have a microsoft wireless mouse, now most of you would think that would be the problem lol, but seriously here is the problem: I have not used this mouse in a few months, because I could not find any batteries, but today, while looking at the mouse, I noticed that there seems to be some...
  19. wolram

    Additive that can be used in cleaning water and detergent

    Can anyone tell of an additive that can be used in cleaning water and detergent, that will help prevent corrosion of electrical connections contacts etc, this may seem a strange question, as the obvious thing to do is not get them wet in the first case, but this impractical as the cost in...
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