Yes, Correct Cleaning Filament is Nylon based Filament that has been allowed to Absorb Moisture from the Air.
The moisture makes it more flexible and ductile. Also makes it “steam clean” your nozzle, lol
Disconnect Bowden tube, heat nozzle to 210-220.
manually push the cleaning filament through until a clean bit has come out the nozzle.
Turn off heater to nozzle.
Wait for nozzle to drop to 160-170C and pull hard on the Filament to remove.
This will pull the carbon and crusties from inside nozzle and heat break out.
Roll up remaining Cleaning filament and save / store till later use.
A 10 meter long Spool should last you a Very long time if you have only one printer