Simplified explanation..

The earth spins on its axis at 23.5 degrees off of vertical.
This is not constant and changes with the distribution of mass.

The amount of wobble is determined by monitoring distant objects such as quasars. The position of all the planets, earth included, is determined by celestial reference.. center of the solar system.. and calculated using 212 astronomical bodies.

To know our precise location we use Very Long Baseline Interferometry[VLBI] which can't be operated continually due to the complexity and expense.. radio-telescopic observations from all over the globe, basically. We need this information for GPS operation. It is precise but could be more precise with new ring laser gyroscopic technology which will operate from the poles. Not perfected but they are working on it.

We know that the north pole is migrating along 79 degrees West at a rate of about 10 centimeters annually and this value is increasing and accelerating. This is the rebound effect from the loss of ice mass that once covered large portions of the earth.

The Greenland melt is estimated to be increasing axial tilt by about 3 centimeters a year and is expected to increase. Ocean warming and expansion is pushing water onto shallow ocean shelves, changing the distribution of mass. This is causing the the northern pole of Earth's spin axis to shift by roughly 1.5 centimeters per year in the direction of Alaska and Hawaii.
Other factors include crust and mantle movement and effects from El Nino which also shift mass.

Warming temperature also affects rate of spin.. as do perihelion and aphelion.
There are other factors which have effects but I'm not going any further than I have at this time.

This information is not hidden. It is all available on the web..

Why do you mix up degrees and centimeters?
Do you intend that people misinterpret degrees with centimeters (OMG Erth axis tilted by 10 deg or 3 deg ...)?
Why not stay at degrees?

To give you (and others) the numbers: 3 cm correspond to approx. 0.0000000005 deg.
For comparison: The Chandler Wobble* can shift the axis by up to 10 m/p.a = 0,0000164°

* The Chandler Wobble is induced by changes in mass distribution during the seasons e.g. rainfalls, the melting of ice, El Nino, ...

Nice copy & paste from Wikipedia - but it is of advantage if the quoter understands what she/he quotes.

Nonsense..? Really...?

Considering the fact that I purposefully used only information from scientific publications to back up my opinion..

... maybe you should take it up with the scientists who published the papers..