ok, clips work good...

Steel Wool or pots and pans scruby in the underwear works wonders.

Forced Butt Plugs durring the night...

Ruber Bands around Arms and legs, Tell them to pull them back X height and snap... X times

Hmmm....

Online Porn Exposure...

or if the equipment is available, Violent wands/Tens Unit...

Hot pepper sauce works great

Iching powder...

Hmmm... Thats all I can think right now...