Banks are science driven. Reduce lending to Wanjiku, convert/make earning the 7.35% interest hard by doing the above or increasing amounts required maybe etc. I hear NBK has sent memos that if you have bad borrowing history you're already disqualified and credit officers to only forward 'clean' loan applications.
“The beauty of success is that it doesn’t matter how many times you have failed, you only have to be right once and then everyone can tell you how lucky you are.” - Mark Cuban