Easyclean...WFP cannot do a complete initial job on conservatories...you can wash the glass/polycarbonate panels and if you are lucky, the grime may come off with pure water but to do a complete initial clean, the best option is a conservatory access ladder, TFR, PVC cleaning cream, a few sponges, a short pole attached to garden hose with a final rinse with WFP...this way, you can market and price for a full restoration clean as an initial clean. You then offer a quarterly maintenance wash which is what you are suggesting, I think.