Chair problem

My chair wee`d on the carpet.   

Yes, I do mean the chair and not myself nor anyone sitting in it.

I was sitting on my office chair in my office/workroom here at home yesterday evening and decided to just alter the height of the seat and the angle of the back slightly.   I pressed and moved the relevant levers under the bottom of the chair when all at once I heard the sound of liquid running.   I jumped up, wondering what on earth it was and where it was coming from as it seemed to be coming from the chair.   It was, out of the bottom at the back liquid was running onto the floor.    I ran downstairs and grabbed a cloth to put on the floor so that it didn`t sink into the carpet.  By the time I got back with the cloth it had stopped running out, so I set to work to mop up and clean the carpet - it was a very acidy, oily sort of smell to the fluid.    

Then, I wondered what to do, I daren`t sit on the chair again incase it made any more come out; I daren`t move it for the same reason.   Standing there looking at the chair, I decided that the best thing to do would be to give it a nappy - so downstairs I ran again, and got a plastic carrier bag, which I`ve now sellotaped to hang below the parts at the bottom where I think the fluid came from.    I think my next move is to somehow find a way to get rid of the chair, as I daren`t use it again.

Any ideas, how?   As a woman on my own I can`t carry it down the stairs, it`s too awkward a shape and weight for me to do that safely. And then, how to dispose of it?