Learn How to Sharpen your Clipper Blade
I know how frustrating it is to be using dull clippers. I know this from seeing how my haircutter handles his clippers as I would a precious possession. He carefully wipes it after every use, inspects it for possible nicks and keeps it in specially designed cases. He knows when it is time for clipper blade sharpening. He also knows exactly what to do when it is time.
Some clippers are designed to sharpen their own blades, but they still need proper maintenance. The idea is to get the clippers to rub against each other so that they get sharpened in the process. The best way to maintain a sharpened clipper is to keep it clean and lubricated at all times and by bringing it for professional sharpening whenever it is needed. You can also learn how to sharpen the blades yourself. There are lots of instructional videos that you will find on the net. You can also refer to the customer service department of your clipper brand.