Was tiling my bathroom and used my bm 940 to cut open some bags of grout. Totally stupid I know. Anyway, a handfull of the dry powder fell on the knife. I blew it off with compressed air, rinsed it in warm soapy water and blew it off again. I still hear grit when I move the lockbar back and forth, but none in the movement of the blade. I guess there is still some down betweent the liner and the handle where the springs are. Is it safe to take this think apart? Just a little nervous that I won't be able to get it back together the same way. This knife is so easily flickable and has a super tight lockup.