Cleaning grimy herbs
Buy grimy herbs, clean them, sell them clean. The simplest processing loop in the game and it trains Herblore.
Cleaning herbs is the purest form of processing: buy grimy, click each one, sell clean. There is no travel, no risk and no failure chance above the level requirement.
The margin is the gap between the grimy and clean price, less the 2% sale tax. That gap moves constantly and can invert, so checking before every batch is not optional.
Buy limits are the ceiling. You can only acquire so many of a given herb per four hours, which is what stops this from scaling indefinitely with capital.
It trains Herblore while it earns, which is unusual for a processing method and makes it a common choice for players levelling the skill anyway.
What you actually do
- 1Buy grimy herbs in bulk from the Grand Exchange.
- 2Clean the whole stack — one click per herb, no failure chance above the level requirement.
- 3Sell the clean herbs and repeat when the buy limit resets.
Getting the most from it
- The margin is the gap between grimy and clean prices, less the 2% tax. Check it before every batch.
- Buy limits cap how much you can process per four hours, which is the real ceiling on this method.
- It trains Herblore while it earns, which is unusual for a processing method.
Similar methods
Blast Furnace gold bars
Smelt gold ore into bars at the Blast Furnace for the fastest Smithing experience in the game, at close to break-even cost.
- Est. GP/hr
- 0–300k
- Starting GP
- 2m
- Attention
- Hands-on
- Requirements
- 60 Smithing
Cannonball smithing
Turn steel bars into cannonballs. Slow experience, steady profit and one of the most AFK activities available.
- Est. GP/hr
- 150k–300k
- Starting GP
- 500k
- Attention
- Very AFK
- Requirements
- 35 Smithing
Cooking raw fish
Buy raw fish, cook it, sell it cooked. A simple processing loop that trains Cooking at the same time.
- Est. GP/hr
- 80,000–250k
- Starting GP
- 200k
- Attention
- Moderate attention
- Requirements
- 40 Cooking