Why do cats cause radiators to lose performance? 

A little reminder for cleaning radiators in summer.
My essentials:
Hex key (allen or BTR): amzn.to/3tWXHmG
Hose for draining the boiler: amzn.to/3tXTBdS
Grease I use: amzn.to/36GQvCp
My joint paste sealing kit, Amazon affiliate link: amzn.to/3x08PAP
My Digital Multimeter: amzn.to/3wXlp3S
Pump that I use for inflating expansion tanks: amzn.to/3XAE5RR
Amazon Affiliate Links.
Video No. 281