I've always cleaned my lines out the night after racing.

Its when the alcohol evacuates and evaporates that it starts corroding things.

For cleaning the nozzles, and bypasses - get yourself a resealable tupperware dish, with lid. Get some of the CLR stuff. Dump your nozzles and bypasses in for the night. Clean the next day with a water bath, then follow up with a light oil such as wd40.

For the barrel valves and the injectors lines, wd40 and oil use some clean mineral spirits to wash them out. Wd40 to coat them between races.

Pump is the same thing, spray some wd40 down in it.

The fuel filter is the biggie. The slightest "clog" on the filter can ruin your night and your pocket book.

For what ever you choose, when reassembling the lines and oil pill holders - NEVER ASSEMBLE THEM WITH PETROLEUM JELLY.