Spruce, the OP appears to me to be talking about fingerprints on shop glass. You appear to me to be talking about UPVC cleaning and restoration ?
Hi Cleanclear.
You are right and my post probably went off at a tangent a bit. Sorry.
The OP definitely needs to remove every finger print from the glass he is cleaning at that moment in time. Jimiwindows has a complete answer to the original post.
However, the question is; how far does he go? I watched a cleaner at MacDonalds about 6 months ago. He cleaned the door glass to a very high standard but within a few moments a few customers came in and left leaving finger marks all over the glass that had just been cleaned. The cleaner was still working on the next few glass panels next to the door whilst this was going on.
I did see him returning to those doors and give them a final clean before he packed up and went on his way. Was it necessary for the cleaner to revisit the doors? But if the manager did an inspection a short time after the cleaner had gone he would have questioned the quality of the clean if he looked at the doors alone. (The rest of the clean he did was perfect.)
This was the reason why I questioned how far you would go. Did that MacDonald's cleaner I saw go further than he needed to by revisiting the entrance doors? The way I see it is that the cleaner's quality standards are high (and good for him), but could he do a perfectly acceptable job to McDonalds without returning to those doors again.