Wet cleaning sensor? Experience, good or bad idea?

i use to wet clean my nikons when i had the dreaded "welded" dust. those f mounts were narrower & deeper but took about 5 minutes with a steady hand & good light. my 5n looks so easy compared to the nikons. i'd try this order: rocket blower - good brush [artic butterfly] wet mop as final try. a good shop charges at least $50 but i'd never pay for a sony nex cleaning as it's very easy.