If I have been outside doing shit I always shower and change before going into my grow. Way too much to lose. TBH I pay people to do my yard work and rarely go outside except to work on my Corvettes and to go camping and do recreational stuff.
About 6 years ago, I consulted for a commercial grow here in Colorado. They kept getting mites. I told them they had to be clean and gave them all the details. They had a dude that was all poor and he would come in and "volunteer" his work watering plants and doing basic stuff like that in trade for a buzz. Well one day I heard him talking about how he had just come from running a weed eater at the owners house! Dude was covered in clippings and bugs. No wonder they always had mites. lol They also grew out a shit ton of bag seeds the owner had saved for years before moving to colorado to start the grow. Well I told them, bag seeds came from hermies and not to grow them. Sure as shit, they had a lot of bananas and totally pollinated rooms. They grew for about 18 months before the state shut them down, never got a single harvest that went to market. The owner wasn't being compliant on the rules for having to supply a certain percentage of their shelved product from their own licensed grow plus there were unpaid taxes to the county.