Hi there I want to disable automatic formatting of table/td/tr widths and heights in Wordpress TinyMCE.

I create the table, literally type the data in (not copying it from word or anything like that) and it adds in width and heights to my table cells. Then I copy the code into a text editor and remove the widths and heights, then paste it back in and it adds the widths and heights again..
Its giving me a headache. The table is responsive using bootstrap classes so no need for widths and heights. 
If I want widths and heights I will manually put them there. 

How to disable this??

Thx