Hi all, had a brand new caliper fitted to my os front wheel last week and since then my pedal sinks slowly and is really spongy. I noticed my brake fluid had dropped drastically and took it back to garage today and he had a look and couldn't see no problems so topped fluid back up and told me to keep an eye on it. When I took wheel off and had a look, the brake hose where it screws into caliper still has thread showing but doesn't seem to tighten up no more, is this meant to screw right in if so why would it not be going in fully? Cheers