My world slowly lags as time goes by

In one of my worlds when  first open it in roll 20 its completely fine in terms of frame rate ,but the longer I keep the world loaded the more the frame rate drops eventually to the point of un-usability. If i refresh the world in my browser the process starts again. I will admit i have a lot of load outs with a lot of up loaded pictures ,but im still no where near my download limit on my plus roll 20 account. It seems to only do it on the one page ,but iv tried decreasing its size and everything ,but it still lags slowly. Please Help.

Hi Frost B, We're sorry to hear that you are experiencing this. Please carefully work through to the first three steps of our guide to Solving Technical Issues: Step 1: Make sure to use the right browser             - Please check if these issues persist when using both Chrome and Firefox. Step 2: Ensure that there are no extensions/addons interfering with Roll20             - Please disable all add-ons/extensions. Step 3 : Clear your cache If steps 1-3 does not resolve this, please work through step 4 and provide us with that information. Thanks!