White Slime

Doing a water change on my new 3rd week cycling tank and decided to clean the back chambers with syphon to rid of any debris.
When I removed the pump and heater to vacuum that section I noticed a type of white oily slime on the pump hose inside and out. Now this is first time I have removed and inspected as did not think it would get dirty this quickly.
The slime was like what you get in still stagnant water so a bit shocked to find it there.

My thinking is it could be grease residue from the manufacturer process but not sure.

Does anyone have any idea or come across this.

I have now cleaned it and put it all back and check more frequently to see if it reoccurs.

Thanks