On a clogged ink channel it is recommended to fill the pen with water, leave it lying for a few days and then thoroughly flush with water; that often suffices. For polishing pure gold nibs, Wenol is very well suited and can also be used on body or clip. Important: gold-plated nibs may not be treated with Wenol, since the agent polishes off the thin gold layer. For gold-plated parts and gentle care, a silver-cleaning cloth or special polishing cloth is the right choice. Wenol develops a quite strong odour, which is to be considered as a disadvantage.