Assertion: fountain pen | /r/HasProperty | cleaned
Facets:
Source sentences:
text: Fountain pens should be cleaned every 4 to 8 weeks, even if they are still writing well.
text: Fountain pens should also be cleaned whenever you are changing from one ink to another.
text: Mont Blanc recommends their fountain pens be cleaned at least every three months, or when the flow of the ink is sporadic or has stopped, or when the ink color is being changed.