thin ice

I have a Kitchen Aid under counter ice maker model KUIX505ESS2. Since we bought it it has produced very thin ice. If I set it to “max ice” it works better but only a little. I have seen some posts on this and it seems it might be the inlet valve. Is this correct? Is this easy to replace myself...

I have a Jenn-air under counter ice maker that was performing perfectly for 5+ years, and admittedly I never cleaned the system with the liquid solution that runs through the system nor vacuumed out the compressor area. About 2 weeks ago it started to make only thin ice. At the thin ice rate...