Here, Seeley runs through his guide to dusting:

Take a clean, neat 1/2 inch-wide section of the hair.
Ensure you have a good grip on your hair. The best way to do this is to wrap the section of hair under your index finger, over your middle finger and then back under your ring finger – sandwiching the hair like a figure of three. This makes the split ends easier to see and ensures that you won’t chop major lengths off.
Reach for a smaller pair of scissors, such as nail scissors, as they allow for a more precise and fluid cut.
Run your fingers down your hair, maintain the figure three and trim any split ends that poke up.
You want to repeat this process until you are satisfied with the outcome. Note that it is best to trim clean, dried hair as products or natural oils will cause the split ends to lay flat so you won’t be able to see them clearly.

“Hair dusting” is the simple DIY way to get rid of split ends without losing inches