You should never use Vaseline (petroleum jelly) on any plumbing fixtures, rubber O-rings, plastic valve cartridges, waterproof seals, or latex items. Because Vaseline is petroleum-based, it reacts chemically with rubber and synthetic polymers, causing them to swell, lose structural integrity, warp, and disintegrate prematurely, which leads to active water leaks. Always use 100-percent silicone grease for plumbing tasks. Verification: Inspect replacement O-rings to ensure they have only touched silicone-based lubricants.
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