I have had my vacuum for a while now and I am finding it difficult to push. Is there something causing this that I can fix?

There are a few things you can check that could be causing this. First you should check to see if the brush roll spins freely, if there is too much debris stuck inside this could make it difficult. Make sure to remove all of the debris. I would also check to see if the wheels are spinning freely. Then make sure that the belt is not loose or broken, if so you should replace it. Lastly, you should make sure that you are using the correct height adjustment setting. To find the best height adjustment, put it on the highest setting, turn your vacuum on and release the handle. Dial the setting down, one at a time until you hear the tone change. This is the correct setting for your carpet.