Both spellings are correct, but "window cleaning" is the more commonly used and accepted spelling. "Window cleaning" is the standard way to refer to the act of cleaning windows, while "window cleaning" is a less common variation. However, both spellings are generally understood and can be used interchangeably. **

Without being able to see the current state of the GIMP brush window, I cannot confirm if it is closed or not. To determine if the brush window is closed, you can look at the top menu bar of the GIMP software to see if the brush window option is selected or not. If the brush window is not visible on the screen, you can try reopening it by going to the "Windows" menu and selecting "Dockable Dialogs" followed by "Brushes." **

A soft-bristled brush or an anti-static brush is good for cleaning a PC. These types of brushes are gentle enough to remove dust and debris without causing damage to delicate electronic components. It's important to use a brush specifically designed for electronics to avoid static buildup and potential damage to the PC. Additionally, using a can of compressed air can help dislodge and remove stubborn dust from hard-to-reach areas. **

A soft-bristled brush, such as a clean paintbrush or a makeup brush, is suitable for cleaning a PC. It is important to use a brush with soft bristles to avoid scratching or damaging delicate components inside the computer. Additionally, using an anti-static brush is recommended to prevent any static electricity buildup that could potentially harm the PC's sensitive electronics. **

The choice between natural bristle and plastic cleaning brushes depends on the specific cleaning task. Natural bristle brushes are better for delicate surfaces like glass or fine china, as they are softer and less likely to scratch. On the other hand, plastic brushes are more durable and better suited for tougher cleaning jobs, such as scrubbing grout or removing tough stains. Ultimately, the best brush for a particular task will depend on the surface being cleaned and the level of scrubbing required. **

No, the wild boar bristle brush does not typically smell after cleaning. The natural bristles of the brush do not retain odors, and they can be easily cleaned with water and mild soap. It is important to thoroughly rinse and dry the brush after cleaning to prevent any potential odor buildup. With proper care, the wild boar bristle brush should remain odor-free. **

The cost of window cleaning can vary depending on factors such as the size and number of windows, the height of the building, and the level of difficulty involved. On average, residential window cleaning can cost between $150 to $300, while commercial window cleaning for a small building can range from $200 to $600. For larger buildings or more complex jobs, the cost can be higher. It is recommended to get quotes from multiple window cleaning companies to compare prices and services. **

Chemical toilet cleaning can be done without a brush by using a toilet cleaning solution that is specifically designed to break down and remove stains and build-up without the need for scrubbing. These solutions often contain powerful cleaning agents that can effectively dissolve and remove grime and residue from the toilet bowl. Additionally, using a toilet cleaning wand or scrubbing pad that is designed to attach to the end of a toilet brush handle can also help to clean the toilet without the need for a brush. Finally, regular maintenance and cleaning can help prevent the build-up of tough stains, making it easier to clean the toilet without the need for scrubbing. **