Best product to keep spiders out of a boat on a lift or in a boat house?

[Rangerdeepv]

Hello darkness my old friend..............keep the lights off when not in use.

[Rich1]

You can be sure that the product that works the absolute best (whatever it may be), kills every spider and they never ever come back has been banned by the do-gooders at the EPA

[tcesni]

You can be sure that the product that works the absolute best (whatever it may be), kills every spider and they never ever come back has been banned by the do-gooders at the EPA

Absolutely not true, spiders are easy to kill.