My blender has started to get hot and the rubber blade turner is being sliced off on the base

Lots of questions, not a lot of information. Is the rubber sealing washer in the wrong place. I have no idea what model/brand you have but on most blenders the rubber seal will go between the beaker and blade assembly, not the blade assembly and the collar.

It will either be the rubber gasket (it goes between the glass jar and the blade assy) or it could be a worn bearing/bush around the chopping blade shaft. Replace either the gasket or the blade assy.

SOak them in hot water with some dawn soap maybe that might do the trick.

You need to unfasten the white base from the clear jug, then the rotating blade will sit inside the white base, with the blade facing upwards. The white rubber flange goes in next. Then screw the assembled base back into the clear jug. The jug should then fit on to the stand.

Here is a list of things to check for:
1. Make sure the blender base (black plastic) is tight to the jar.
2. Make sure you have installed the rubber washer between the blender blade assembly and the jar.
3. Make sure your rubber washer is free from any crud that may have accumulated and dried on. You may have to soak the washer and gently scrub with a scrubber sponge. If it's really cruddy you may have to repeat as necessary.
4. Make sure you have not caught any water (or other liquid) when filling it between the base and the jar. When you pour out the contents it will appear as if it is leaking.

gently tap the base with a rubber mallet or even the sole of a sneaker. Work your way around and it will come out.

Look at the underside of the blade shaft. The metal wing nut on the end of the shaft secures the blade assembly to cream coloured plastic blade base. The wing nut also transmits the drive from the rubber coupling on your blender to the blade shaft. The wing nut has a LEFT HAND thread.
The left hand thread ensures the blade assembly does not unscrew during normal blender use.

Firstly disassemble the blender blade assembly. Place a folded tea towel over the blades and hold the blades firmly. If you do not use a tea towel you may cut yourself.

Grip the wing nut with your other hand and unscrew it CLOCKWISE.
Remove the wing nut. You can now remove the blade from the plastic base.

Put the blade assembly in the new jug and offer up the plastic base from under the jug so that the blade shaft protudes enough for you to install the wing nut.

Screw the wing nut ANTI-CLOCKWISE to secure the blades to the plastic base.

Do not over tighten the wing nut; you may have to replace your jug again at some point.

You will definitely need to change the clutch blade i.e. the black rubber rotating bit. Chaging it on the base unit may be difficult, I would check with your local Kitcheaid repairer for spare parts and repair advice.

Also check the clutch blade on the jug itself.

You just bought a bad blender. Get a different model