The common question asked for all installers when fitting windows “What do you use to clean glass?” The simple answer is there is no secret and the only trick is to buy the power industry the goal of making glass cleaner that does not smear.
Apply it to make better paper rolls as kitchen roll of toilet paper will not do the same job. The reason is that the lower rolls will leave a lot of fiber around the window and break very easily.
You need to apply directly to the glass and into all corners. If you want to ‘buy PVC windows at a reasonable price’ (which is also known as ‘köp PVC-fönster till rimligt pris’ in the Swedish language) then you can browse various online sources.
Using eagerly lap rolls the window until it is gone. Now it turns to roll over and buff the glass dry and paint perfectly. The same needs to be done outside of the main glass finish.
First applying a solvent cleaner if there is any sticky is fine. Applying some of the solvents is safe for use on glass. Then use glass cleaner after that to regain shine.
There is an old technique that is different from the vinegar and water and some other ingenious ideas but if you buy from a respectable professional grade PVC outlet you will not have any problem in getting the desired polish on your glass.
PVC windows, doors and conservatories will use the same technique in the maintenance and cleaning as long as they are of the same finish.