Conflict of interest and Source of funding statement:

Nico Boon, Marc Quirynen and Wim Teughels have filed patent applications for some of the substrates described in the work.

This study was supported by grants from the Catholic University of Leuven, the Research Foundation of Flanders (Fonds Wetenschappelijk Onderzoek‐Vlaanderen, FWO), and from the Colgate‐Palmolive Company.