Is the hair on your brushes splitting? Are the bristles dry when you pick them up? Are they unable to hold a point? Miniature brush care will help avoid it!
Splitting brush fix needed! : r/minipainting
The Do's and Don't's of Caring for Your Paint Brushes – Etchr Lab
Hair 101: How to Find Best Brush For Your Hair
Age of Miniatures
Brush question on upkeep and quality : r/minipainting
Choosing your brush
How to fix damaged paint brush Artist Hack - Paintastic Arts
Are You Making the Most of Your Fan Brush?
Miniature Painting Tutorials and Guides for Hobby Projects