Can some one please tell em why my artis opus brushes don't last

Artis Opus - Series D: Brush Set by Artis Opus — Kickstarter

Ampersand Art Artist Panel, Canvas Texture, Uncradled, 3/8, 50% OFF

FauxHammer - Artis Opus Starter Set Announcement - FauxHammer

Artis Opus - Series M: Brush Set by Artis Opus — Kickstarter

ARTIFY Drybrush Set with Dampening Pad and Brush Soap

It's taken about 10 years but I've finally gotten to the bottom of a Masters Brush Cleaner! : r/Warhammer40k

Artis Opus Series D Review for Miniature Painters, Wargamers

Artis Opus Manchester

Artis Opus Manchester

Wot I Think – Artis Opus brushes

Artis Opus - S Series Brush #2 - Heretic Games