Multi-X is more versatile but I use Inside (diluted 1:1) with their Innerscrub mitt. The innerscrub is like a microfiber version of a scotchbrite pad. Works great.
I try to avoid any protection on interiors since the surfaces are already coated from the factory (unless you have real leather). The "protectants" are really just diluted silicone dressings that add gloss and attract dirt.
You dont like 303 Aerospace Protectant? It claims it does not have Silicone.
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