how to clean a mig welder liner

How to Clean a MIG Welder Liner

A MIG welder liner helps your welding wire glide from the wire feeder through the gum cable and up into your contact tip easily. Without the liners, the wire cannot glide smoothly. The liner guides the welding wire and ensures the wire remains on the correct path.

If your liner cannot do its job, your gun becomes inoperable and you can’t weld anything. Several things can affect the performance of the liner causing quality issues in the weld. MIG welding machines use different liners, and a welder should determine the right liner for their MIG wire and learn about how to clean a MIG Welder Liner.  

Dirty MIG Welding Liners

A dirty MIG liner creates problems with your MIG welding and makes the MIG welder gun inoperable. You can’t get the best results when the liner is dirty. How does the MIG welder liner get dirty? Negligence is a major contributor to a dirty liner. The best way to ensure your welder liner remains clean is by cleaning it frequently. This is a prevention measure that safeguards the liner.  

Use a proactive approach to eliminate dirt and avoid serious failures. Dirty liners reflect your failure to clean the liners regularly. Bending the cable and liner on the MIG welder gun causes problems with the wire liner. Liners are made to create a balance between rigidity and flexibility.

Liners guide the wires when they are in awkward positions or when your gun cable is bent out of position. If you bend the cable continuously too much, it causes poor wire feeds, dirty liners, and bird nests leading to wear out even before its lifespan. The difficulty causes metal fragments to accumulate in the liner leading to too much tear and wear.  

The little metal fragments and particles slowly start building up and causing massive blockages in your wire feed. This can happen even if you don’t bend your cables too tightly, although with a lesser chance. Cleaning the liners regularly extends the life of the liner.  

Improperly installing the liners after replacement or cleaning can make the liners dry quickly. So be careful when installing the wire feeder. Twist the cable or trim it to fit your liner so that it’s not too short.

Don’t create gaps that will feed your welding wire erratically or allow the liner to catch dirt.  

How to Clean a MIG Welder Liner?

There are a few cleaning tips you can use to ensure your liner remains on optimal level. Clean the liner weekly to maintain optimal performance. The straightforward approach gives you effective cleaning and leaves your liner dirt-free. 

Inspect the Quality of the Liner

Test your liner to know if it can perform well or you have a bad liner that needs a replacement. Bad liners cause drag and reduce efficiency.

You can use the welder grease to keep the liner clean because the gel also works as a nozzle cleaner. A dirt-free nozzle ensures your MIG welder works efficiently and makes fewer splatter. Inspection enables you to know its shape, bad or good. Check the overall state of the liner to determine if it can handle the task.

Remove the Liner Nut

Loosen your liner nut using a spanner and remove the nuzzle, wire, and diffuser from the liner. Most welder machines come with a wrench which you can use to remove the liner nut from your MIG welding gun. Remove the liner from your welding lead.

Blow Air Through your Lead to Remove Debris

Use compressed air for the work. The machine explodes inside the welder liner and flushes out the filth. The compressed air pushes out metal powders stuck inside the liner and keeps your liner clean in the process. Ensure you eliminate all manner of kinks even in those hard to reach areas leaving the liner clean.  

Install the Liner back

After cleaning, you can install the liner into the MIG gun keenly and gently. This prevents the liner from curving.

Tighten the liner using a spanner to secure it into position.

Feed the liner into position through the welding gun neck. Set your liner back in the welding lead.

Replace your Liner

Only replace the liner if it’s too damaged and cleaning can’t restore performance. This means the liner causes more blocking and only a replacement will improve performance.

Install a new liner and buy consumables that will help fix mistakes. A good liner is one that is in great shape ad not blocked or bent. Good shape is vital for the optimal functioning of the MIG gun. 

Benefits of a Clean MIG Welder Liner

The greatest benefit is the prevention of kinks in your liner. Kinks are responsible for problems such as bird nesting and wire feeder problems. These problems compromise the efficiency of your MIG gun leading to poor quality welds. 

Do proper cleaning to eliminate metal powder and other debris which accumulate in the liner over time. The debris blocks the welding wire leading to poor welding wire feeding.

Proper cleaning removes blockages from your liner and enhances the efficiency of your MIG gun. 

Clean the MIG welder liner regularly to increase durability and remove all blockages and debris that can damage your liner and shorten the lifespan. 

What are the Types of Welder Liner (MIG)?

There are several MIG weld liners. The most widely used liners are Teflon liner for aluminum and Teflon steel coated liner. Every MIG welder manufacturer produces liners for various welding wire sizes.  

Steel Coated Liner

The welding liner uses steel wire and has an accurate balance of both rigidity and flexibility. This is a good liner for enhancing the performance of a welding machine. The liner is appropriate for mild-steel welds. You can always choose another type of liner if you have problems with this liner.  

Liner for Aluminum

Suitable for aluminum wires and welds easily. Aluminum wires always move fast and create less drag. You enjoy a better experience using the liner for aluminum welding as long as you set it up properly. 


How do you know if the MIG welder is good? 

You know your MIG welder is good when your welds have uniformity. There should not be cracks in the bead middle or discoloration of the base metal.

Why are MIG welds black? 

The black soot signifies magnesium oxide which forms when the arc’s heat vaporizes magnesium and gets in contact with oxides resulting in black soot. You need a proper gun push angle of 15 degrees to improve the gas coverage at the leading weld pool edge to reduce black soot. 

Why are my welds so tall? 

The welds are tall when you haven’t set the right voltage to help the arc pool melt the incoming wire. To remedy it, reduce the wire feed or raise your incoming voltage setting. 

What causes MIG welder to spatter?

The common cause is excessive wire speed. Spatter also occurs when the filer wire enters your weld pool. This causes the solid wire to melt rapidly because of the extreme heat. The wire melts, the filler turns to liquid creating a pool. 


I hope you understand how to clean a MIG Welder Liner and why. MIG welder liner is crucial to getting quality welds. If the liner is damaged or dirty, you don’t get quality welds. Therefore ensure your liner is clean to enhance efficiency. 

Clean the liner preferably after every two weeks to remove debris and metal powder that reduce the lifespan of the liner and efficiency. Keep the liner dirt-free and use the MIG nozzle cleaning gears to keep your liner dirt-free. 

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