Two weeks ago, I participated in the 2019 International PV Soiling Workshop, organized by NREL (USA) and IRESEN (Morocco), in Marrakech, Morocco. It was a great occasion for meeting colleagues and experts focused on PV soiling and to present the progress we made in Jaén. I delivered three presentations, and chaired one session on "Standards and Testing". We also visited the facilities of IRESEN, where the Fig. 1 was taken. Fig. 1 - Kipp & Zonen's DustIQ at IRESEN, Morocco. Si