Sounds less like spiders than maybe you got into either some fleas 'er more than likely seed ticks.... But either way, light offf a bebugger fogger bomb in the wardrobe while yer away an' problem over, no matter what it is as long as it's a bug....
Now there are a few guys who come home with marks all over 'um blamin' the marks on bugs and, well, you ain't gonna get these marks from bugs so let me pose this last question to ya: Is this yer final answer, congressman????