Wash gore tex with a specific product like nikwax tech wash, or just use pure soap flakes. I wash mine around once a snow season. Or sooner if I’ve gone on a r

Wash gore tex with a specific product like nikwax tech wash, or just use pure soap flakes. I wash mine around once a snow season. Or sooner if I’ve gone on a really dirty summer hike. If the pores of the fabric get clogged with dirt it doesn’t repel water as well. Wash the jacket, then give it a gentle tumble dry. This warms and reflows the DWR coating. If it isn’t beading and shedding water after this, consider re-applying a DWR. I like nikwax, I find it effective and it’s less horrible than the aerosol ones.