SDL screen not updating properly?

I'm not sure which part of my code you'd like to see, and I don't think posting all 5 of my source files is neccessary, so I'm just going to ask a general question. In my SDL program, I have a sprite that when moved(responding to appropriate key presses) it does move, yet it leaves a sort of "drag"(bits of the sprite's image) behind. This "drag" sticks and stays on the screen, naturally this is not desirable. I DO call SDL_Flip each loop and in past SDL programs I've not encountered this. Below is a screenshot, and if anyone has any idea as to what needs to be fixed, I'd appreciate it. If you need to see a certain section of code, then I'll be happy to oblige. Thanks again.

SDL_Flip() will just update the screen. The problem is probably that you don't clear the screen before drawing each frame.

Clear the screen? If you would, explain a little more? I've blitted sprites before with virtually the same routine.

Basically you draw a big black rectangle that covers the whole screen to wipe out all the old stuff, then start drawing new stuff.

Ahh gotcha. My old routine loaded the background each time so that's why it didn't have this issue. Thanks.