What Is The Difference Between Deoxit And Contact Cleaner?

Discussion in 'The Workbench' started by 19rellimcm37, Sep 11, 2018.

  1. 19rellimcm37

    19rellimcm37 New Member

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    Now that I have my Marshall JCM 900 retubed, the volume pots are scratchy when move the knobs.

    I bought a can of CRC Contact Cleaner from a big box store and sprayed it on, after pulling the knobs off and no change. I did the same for a Fender 2X12 and it made the world of difference.

    Reading thru other posts on this forum. I see someone else recommended Deoxit. What is the difference between Deoxit and Contact Cleaner? Also why did the Contact Cleaner work on the Fender Amp and didn't work on the Marshall Amp?

    thanks
     
  2. Micky

    Micky Well-Known Member VIP Member

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    You can't just spray it on a pot and expect it to work. You have to spray it INSIDE the pot and then work the control back and forth. Generally there is a small access port on the back of the pot for this, very rarely can you spray it on the shaft and have it work.

    There are several types of cleaners, some with lubricant. CRC is just a different brand than DeOxIt.
     
  3. mickeydg5

    mickeydg5 Well-Known Member VIP Member

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    Not all potentiometers can be helped. Some need replacing.

    Or it could be a DC leakage issue. Did you think of that? Or did you even know about that?
     
  4. Coronado

    Coronado Well-Known Member

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    About 50 bucks. :D The Deoxit G100 Gold improves conductivity (good for pots and various electronics/gear). Cleaner (like CRC Electronics Cleaner) is not used for pots (can actually damage your pots), and its made for getting the gunk out. I initially bought CRC (thinking it was good for scratchy pots and the like), but soon was informed that the Deoxit G100 was what I was needing.
     
  5. Gunner64

    Gunner64 Well-Known Member Premium Member

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    Pots need a lubricating cleaner..deoxit d5 or the like is a lubricating cleaner. Other non lubing cleaners will say "zero residue" or something like that..don't use the non lubing kind on pots, it will actually take any lubricant the pot has and flush it away..not good
     
  6. danfrank

    danfrank Well-Known Member

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    The above is very true; it will actually leave the pot in WORSE condition because a pot with no lube will freeze up in short order and you will not be able to turn the shaft any longer. Your CRC contact cleaner is a zero residue cleaner... Bad for pots.
    Get some DeOxIt; yes it's expensive but it is good. Spray some of that into your pots and you should be good to go. All it takes is a SUPER SHORT squirt, don't over do it. Deoxit will clean, lubricate and remove any oxide coating, hence its name.
     
  7. mickeydg5

    mickeydg5 Well-Known Member VIP Member

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    Agreed. A good cleaner and lubricator is needed for potentiometers.
     
  8. Chris-in-LA

    Chris-in-LA Well-Known Member

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    See? Now I can hear the laughter in almost every post. Am I wrong?
     
  9. mickeydg5

    mickeydg5 Well-Known Member VIP Member

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    You are now making me laugh. :D
    Notice my questions and answers are usually short and direct.
    No, seriously, are you aware of those things? Several things can cause scratchiness. Many do not know about DC and potentiometers.

    As mentioned, potentiometers need a lubricant.

    Los Angeles or Louisiana?
     
  10. Chris-in-LA

    Chris-in-LA Well-Known Member

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    I wondered if people got that LA is Los Angeles and not Louisiana
     
  11. danfrank

    danfrank Well-Known Member

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    L.A. is Los Angeles
    LA or La is Louisiana
     
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  12. ampmadscientist

    ampmadscientist Well-Known Member

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    The pots in the amp probably just need to be cleaned.

    CRC Contact cleaner has no lubrication.
    This is a bad choice.

    Spray the cleaner inside the pot, not on the shafts. You need to open the amp up, and spray into the pot.
    The pot has an opening to spray into.
    You can use Deoxit G100, D100, or LPS-1.
    Deoxit 5 is mostly solvent and will not last very long.
    G100 is the longest lasting but also the most expensive. (also known as Pro Gold 100)
     
  13. mickeydg5

    mickeydg5 Well-Known Member VIP Member

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    CRC does manufacture separate lubricants.
     
  14. Guitar Rod

    Guitar Rod Member

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    Personally, if a a pot is really scratchy I use a "no residue" contact cleaner to flush it out well. Doesn't leave lubricant everywhere on the board, etc. Then after it dries I give it a spurt of control cleaner with lubricant in it and work it around. My Lead 12 had a pot that had a big hump in it as well as a gap in the middle of the hump. Did this and it's like a new pot. Smooth as silk. All my pots work like a champ doing this.

    I don't use DeOxit. In Canada we have MG Chemicals Nu-Trol contact cleaner and control cleaner. WAYYYYY cheaper here and works just as well. Got both in a bigger can for less than a can of DeOxit.

    Zero Residue
    [​IMG]

    Lubricated
    [​IMG]
     
  15. ampmadscientist

    ampmadscientist Well-Known Member

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    So where are you Chris?
    The city of Angles? Or down in the Bayou?
    Is it going to be Budweiser or Abita Amber?
    Is it going to be Tacos, or Mud Bugs?

    Tell it like it was, dude.
     
    Last edited: Oct 6, 2018
  16. BowerR64

    BowerR64 Well-Known Member

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    When the parts oxidize they create a coating between the contact points that keep them from making connection. When you spray them it breaks down that coating then leaves behind a lubricant that prevents them from oxidizing again coating the contacts with the lubricant prevents moisture from getting in on the contacts again.

    It also keeps the grit away from the contacts to keep the noise and static down
     
  17. Chris-in-LA

    Chris-in-LA Well-Known Member

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    I love tacos, Los Angeles.
     
  18. ampmadscientist

    ampmadscientist Well-Known Member

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    Every Tuesday here, we have Taco Tuesday.
    Sometimes on Wednesday, we have "Taco-topia."
    We also love Tacos.

    At first it was rice and beans, but then it became much more serious.
     
    Last edited: Oct 7, 2018
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  19. Trident

    Trident Well-Known Member

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    Don’t forget the after shock the tacos give ya if you eat enough:rofl:

    May the games begin:scream:
     
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  20. mickeydg5

    mickeydg5 Well-Known Member VIP Member

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    They do have tacos as well as budweiser in Louisiana. :scratch:
     
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