I went for the renewal recently. Booked an appointment at 11 but was served around 1.15. I had arrived around 10.20 to line up. Overall, it was more civilized than waking up in the early morning. One observation though, try to book an appointment either early in the morning or later in the afternoon. Most people seemed to have appointments between 10 and 12 pm.

Old passport
Printout of online application form
3 copies of the payment receipt
Print out copy of appointment date
Photo copy f last 4 pages
Original and copy of ID
Recommenders ID copy signed ( any Kenyan citizen will do )
2 photos
Parents ID copy
Next of KIN copy of IDs

Next of KIN copy of IDs? Do i presume you mean Recommender's copy of ID? And that cannot be a 'Next of KIN?'

No i did not. I left my documents with passport control Mombasa when it became clear that the immigration officials were hell bent to extort a bribe from me to the tune of a staggering kshs. 5000. I told them to their face that they can stay with their passport and had to regrettably forfeit international travel this year.(sipendagi ujinga)

My policy is never, ever bribe gok officials to get a service. I will go there to collect next year , if it is not ready by next year i will escalate to H.E. Uhuru/Matiang'i himself via wazua and other avenues

If you find someone who can 'motivate' these bribe seekers into doing their work, please share. I'm already dreading making my application in Mombasa, even before doing so... sijui I get a Senor Police/Anti corruption officer to be my recommender?