Pre-inked stamp acting weird in the cold

My Xstamper N18 goes ghost-faint for the first two impressions after sitting in a 28°F car, then prints normal — and it also bleeds through some thin acknowledgment pages from one lender. Anyone switched to a Trodat 4913 for winter, or do you just keep the stamp in an inner pocket?

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I treat my Xstamper like lip balm — inside coat pocket or a tiny neoprene sleeve with a hand warmer; the oil ink thickens in the cold, so one sacrificial stamp on scrap stops the ‘ghost-faint for the first two impressions.’ Are you using OEM Xstamper oil and backing the page with cardstock to keep it from transferring to the next sheet? Trodat 4913 behaves better for me below freezing, but on that lender’s thin ack it can bleed a tad more.

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