So below you will find a list of commonly asked questions, we hope to create a comprehensive, informative and sensible list of FAQ's for new members and oldies alike. This will enable users in a short amount of time get answers to these kind of questions. Please click the questions to see the answers. If you feel a FAQ needs adding please reply to this post and we will add it. Spoiler: HOW DO I USE THE SITE & FUNCTIONS We have several video tutorials here showing how to use pretty much every function of the site Spoiler: Do I need RO or DI, and what's the difference? Read about DI here and RO here. They are two different water filtering systems that can be used together or separate. In the short term DI only might be cheaper BUT if your TDS is more than 100 you will want to be looking at a Ro system. Spoiler: What is TDS and a TDS meter? A TDS Meter indicates the Total Dissolved Solids (TDS) of a solution, i.e. the concentration of dissolved solids in it. Since dissolved ionized solids such as salts and minerals increase theconductivity of a solution, a TDS meter measures the conductivity of the solution and estimates the TDS from that. Dissolved organic solids such as sugar and microscopic solid particles such as colloids, do not significantly affect the conductivity of a solution so a TDS meter does not include them in its reading. A TDS meter typically displays the TDS in parts per million (ppm). For example, a TDS reading of 1 ppm would indicate there is 1 milligram of dissolved solids in each kilogram of water. As a rule of thumb, for window cleaning you really want to ensure your ppm is below 10 and as close to 0 as possible. Spoiler: Pencil Jets or Fan jets? This is often down to personal preference. Some will prefer pencil jets which are just straight jets of water when others will prefer fan jets, as the name describes. Fan jest produce a fan like pattern of water. You may feel you get a better rinse with pencil jets but really it depends on the individual, neither is better or worse. You may want to not that the majority of brush's usually come as standard with pencil jets unless otherwise specified. Take a look at this video for a visual idea Spoiler: How do i price a job? This is very subjective. It really depends on my factors like method, area, if you are still learning the ropes etc. If you are very new to window cleaning, be it traditional or water fed pole, the likelihood is that you will take longer to do the jobs for a little while until you find your feet and become confident. Also areas make a difference to an acceptable price. All these factors need to be considered. As a general rule though you want to be looking at how many windows there are, what the access is like how easily you are able to move around and get the job done. Often window cleaners will set a rough guide of £1 per standard window £2 for say a bay type window and patio doors. This is very rough but will give you and idea. Better is to clean your own house and friends, get a feel for how long it takes you. You then want to decide what you will be willing to work for per hour. A rough fair average would be around 10-30 an hour. Some jobs you maybe closer to the £10 an hour other jobs you may be close to £30 an hour it depends. So now you have a rough figure in your head of what you want to earn and a rough idea how long you take you can derive a price from this. Its not an exact science and will take a little master but one thing you must try not to do is under price just to get the job, Take a look at this - Stop competing on Price Spoiler: What is dog earing and how do you do it? Dog earing is a term used in the business that refers to the bending of the end of the channels on a squeegee. This prevents the rubber riding over the edge of windows seals stopping that annoying gap! There are a couple of ways to do it so it may be better your you to watch both this video and this one.