I need help with my TV ? !

My TV is an old one but recently the image has started to slant , this slant is on the right side . To put it into words it is tho someone has attached a weight to the bottom left corner , that has dragged the side down it is a gradual slant max of 1.5cm . I know i have to buy a new TV ( that’s planned for next year ) i was just wondering if anything could be done now incase it gets worse , apart from this the TV is still in great condition and you only really notice it when doing certain things . What could case such a thing to happen to the screen , i know if you get magnets close to a screen the colour bleeds but what would make it drop down / slant ?