Outdoor antenna install question

I got me a 75 mile range outdoor antenna...I used all the old cables that direct TV had ran to 2 rooms of the house and just used a splitter but some are spliced in a few places..can't get really good reception..not as good as I'd thought I'd get anyway....anyone have any insight as to where I need to run the splitter in the line... thinking of getting all new rg6 cable and starting fresh... probably a total of 100 foot of line.... probably around 50 to the splitter and from the antenna then 25 feet or so to each tv