How to clean silicone sealant

I have a 2022 Rpod 192 that I noticed a water leak inside the trailer where the outside water to tank line connects. Water was dripping between the water line and fitting. I had to remove the three screws Golding the fitting to the outside wall in order to pull out the fitting and hose to repair the leak. My question is what do I use to remove all of the silicone sealant that was around the hose fitting and what sealant should I use to replace the old with new. Thanks, Bill