Use a drip pan directly underneath the turkey ... The next time you fire up your Weber Grill, consider taking your rotisserie ...

Prepare the grill. Attach rotisserie attachment and remove cooking rack if necessary. Place a foil drip pan, using one with sides short enough so when the chicken turns it will not hit it.

But, I've found most rotisserie units made for the home to be inadequate, usually leaving behind big messes and, in the case of outdoor grill attachments ... There are non-stick drip pans and grates, ...