Full timing and black tank issies

[JulieLeah15]

I’m relatively new to full timing and I love it so far! I’ve run into a little hiccup. My black tank seems to be only draining the liquid, not the solid matter unless it is flushed out. I’ve been using the Scott RV toilet paper only. Any suggestions to fix this? Flushing the tank once a week is a little bit of a pain. The tank is closed unless I’m draining it.