I don't think s/he should get a keyboard just for those off chances that s/he'll spill something on it again... the real solution is always to keep beverages slightly further away from the keyboard, but not so far that your hands can't reach it. That way, if it spills, it'll mostly only go below the keyboard.
I'd say buy a good keyboard that will last. A mechanical keyboard, or one of those faux mechanical keyboards (like the ones logitech makes). If you want compact, a 10 keyless would work very well.
Besides that, English-speaking wise, for me (in my opinion):
"About that... I've got my ways." --> This is normal to say... but I don't think it's the best choice of words as a response for that scenario.
"Oh, I've got my ways." --> Looks more natural for the scenario.
"Let's say I've got my ways." --> This could also potentially work... but it's missing something. Can't put my finger on it.