The Ichamama Factory, managed by Othaya Farmers Co-operative Society, is one of the oldest wet mills in Kenya. It has a reputation and history of producing the best cherries in the region. The wet mill has perfected the art of natural processing and blending of SL 28 and grafted Ruiru 11 varieties. Founded in 1964 in Karima ward, Othaya sub-county, at 1,730 m.a.s.l, the factory was named after the Ichamama River that originates from the Aberdare ranges. The peaks of Mt. Kenya can be visible from the area very early in the morning.

Ripe red cherries are handpicked by the Othaya Farmers Co-operative Society farm owners, their family members, and farm workers. The cherries are delivered to the Ichamama Factory where they are hand-sorted to remove immatures, insect-damaged, and unripe cherries. The cherries are then weighed, and the weight is recorded per grower to assist the society during the final cherry payment. The cherries are then dried on raised beds under natural sunlight for up to 29 days until a moisture content of 10-12% is reached. The dried parchment is then hand-sorted a second time and stored in airing bins. When the quantities are sufficient, the parchment is delivered to the dry mill for milling, grading, and bagging.

Nyeri County, located in the central region of Kenya, has ideal regional conditions for coffee production, including an annual rainfall of 11,00mm at 1,650 m.a.s.l., cool temperatures of 16-26°C, and mineral-rich red volcanic soil. In addition to coffee, other common crops grown in the area are bananas and maize. Grevillea ("spider flowers") and macadamia trees are also planted to provide shade to the growing coffee trees.