uPVC Frames – If there is algae or dirt on the uPVC and it is not removed, it will become harder to return to its pristine condition when you do get round to cleaning it. Ensure you use a non-abrasive cleaning product (avoid solvent based products and cream cleaners) warm soapy water will normally suffice. Use a soft, clean cloth (try to avoid coloured cloths as the dye can stain the plastic). Do not use abrasive sponges as these will damage your frames, coloured foiled frames can be cleaned in the same way. If you have aluminium bi-fold doors cleaning is also simple, all they will need is a routine clean with warm soapy water, they also need to have their tracks free from debris, using a suitable vacuum cleaner with a thin attachment to remove any debris is the easiest thing to do.