As important as washing them first is inspecting them first and after washing them, before the first use. Depending on the brand/supplier, there may be tags to remove. Also, if the borders are stitched and cut you need to make sure none of the cut off remnants are stuck in the microfiber. Unless a supplier states that they pre-inspect and wash their MFs I always wash mine first. Plus it helps fluff them up for the first use.
Here's a few of my reasons for washing Microfiber-towels (MF-towels) before they are initially used on my vehicles:
•I think about from where almost all Microfiber towels originate: Korea; China.
-They must be transported for long distances in a ship's hold; or in some airplane's belly; in the back of some delivery truck...before they reach my vendors/resellers
-They are transported alongside/on top of/under/with "who knows what else items"
•To remove:
-excess chemicals from the MF manufacturing processes
-loose threads (from cutting the MF)
-sewing machines' oils
-oils and dirt from the hands of the factory workers
-contaminates from MF being dropped on floors, etc., during manufacturing/packing/shipping
-outgassing from plastic packaging material
-etc.
I say: Wash 'em first...Why take the risk?
Bob
"Be wary of the man who urges an action in which he himself incurs no risk." ~Joaquin de Setanti
Wash wash and WASH them first.
The only ones I know of that are pre-washed are the edgeless (ultrasonic trimmed), but that's only to remove lint from the process. That doesn't however mean that I'd be willing to use ANY unwashed towel.
That aside; I do know a local high-end high-priced guy that uses "virgin" Wal-Mart towels, (you know, the white and blue ones) right out of the packaging, once (even on paint correction) and throws them away afterwards. Whatever works I guess.
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