Running the iron against the wrinkles in any way may result in uneven flattening.
How to flatten a folded rubber mat.
Squeeze the iron handle to generate steam to moisten the rubber allowing it to stretch.
If you reverse roll your rug listen for cracking that could indicate weakness.
Unroll the mat as flat as you can get it.
1back roll or reverse roll the carpet.
Move the iron with the direction of the wrinkles to flatten the rubber back out into its natural shape.
The mat is the picture above relaxed in about two days.
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To avoid damage try another way.
You should be able to see a drastic difference in about 24 hours and the mat will typically lat flat at 72 degrees f in about 3 full days.
Then flip it over and reroll the mat.
If you hear cracking noises stop immediately.
Creating this opposing new curl shape will in effect straighten the curled plastic.
Run the hot iron slowly over the rubber in the direction of the wrinkles.
Step 1 take either the steamer or the wet sponge towel and dampen the edges of the unrolled rug.
Most people want it to lay flatter faster.
Allow this to dry this way and see if it helps.
To flatten your rug use heavy plants books upturned furniture or mattresses to push back on the fibers.
Keep it rolled up longer for thicker less for thinner plastic with a rubber band and check it every so often until the previously upturned curled corners are laying flat as.
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Leave the mats and allow the heat of the sun to release the tension of the fibers naturally.
If you don t have space.
Unroll the mat and repeat the process across the width to remove the creases and to make sure the mat lays flat in the footwell.
In this video i am fixing unwarping my self healing cutting mat that got warped and bent with the heat from my laptop.
Place the mats outside in direct sunlight if you live in a region where temperatures exceed 75 degrees fahrenheit.
In the winter it may be more like 7 days or longer.
Use any single one or a combination of several.
Since rug bumps and folds are usually caused by stretching dampening the edges of your rug should flatten it.
Of course over time the rug will eventually flatten out on its own but that is assuming that you don t continually fold that edge over from stepping on it.