Hello & welcome!
Fluid on the hose & fittings indicates a leak. If fluid can leak out then I assume that air can leak in which could explain why it droops down after a few days.
Step one would be to try tightening the fitting(s). Clean all the leaked fluid off so you can check for continued leaks or not. Cycle the jacks down & up a few times to make sure the system is full of fluid (no air bubbles or pockets of air).
If the evidence of leaks does not stop then the hose(s) & fittings might need to be replaced.
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Eric
North Carolina
2015 ACE 30.1, 2017 RAV4, 1999 F250, 1991 Honda ST1100, 1984 Alfa Romeo Spider, 1981 Alfa Romeo GTV6, 1961 MGA
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