Slightly binding front calliper

[dan 244]

So now the next problem!!

So one of my front callipers seems to not completely release the pads completely. It feels free, the slide pins are new, I have worked the piston in and out a few times with a bit of brake fluid around it. The pins are well lubricated. It comes on and grips ok, recently passed mot, but when you release the brake it doesn’t seem to retract quite as much as the other side. So when you spin the wheel by hand it only spins about 1 turn once you let go, where the same on the other side it is about 3 or 4 turns. Also comparing the temperature after a run that wheel always is slightly hotter, but not silly hot if that makes sense. It also squeakes slightly like a chirping canary.

So is there anything that affects the retraction of the callipers like in the servo or master cylinder or will I simply need to replace the calliper?