This is exactly what I have. An IKEA knife I’ve had for the past 20 years or so. I’ve always kept it sharp, but the game changer in the past few months was reading advice to sharpen it every time I use it. I do that now, just a little bit, and over time what you end up with is an insanely sharp knife. I also have a sharpening steel, like the kind used in commercial kitchens, but I much prefer the stone.