I use 3-in-1 RV Rubber care on a rag and wipe the seals. If you soak the rag liberally, then carefully pull back the wiper seal, you can run the rag down the seal getting both sides at the same time.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
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Robert & Diana McNeal
2019 Montana Legacy 3791RD 20th Anniversary Edition
2014 F350 4x4 6.7L SRW
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