Snagging with a potential to losing your magnet can be a real issue with magnet fishing. If your magnet does get stuck walk up the riverside and pull the magnet from various angles usually this is enough to get the magnet free

Always wear gloves

Always wear a pair of good quality thick waterproof gloves while doing this hobby.....

Quote from Google......

Weil's Disease (Leptospirosis) Weil's disease is a form of a bacterial infection also known as Leptospirosis that is carried by animals, most commonly in rats and cattle. It can be caught by humans through contact with rat or cattle urine, most commonly occurring through contaminated fresh water
Always have a bottle of anti-bacterial hand gel in your pocket

Clear your hands properly before eating

Keeping clean is of the upmost importance

Keep yourselves safe and enjoy your rusty river treasure!! 

Cleaning your magnet

Take care while cleaning your magnet, often sharp objects like rusty nails, knives etc are picked up by the magnet and can take some getting off a strong magnet, this risks piercing through the gloves and into your skin

A plastic windscreen ice scraper makes a useful safe magnet cleaner


Rope securing

Always make sure you tie a secure knot remembering most knots can halve the breaking strain of the rope 

There are plenty of examples of how to tie knots online 

Securing a carabiner shackle to the other end of the rope means it can be conveniently tied to a tree or even round your waist so you can keep throwing the magnet in the water without risk of losing it

Finger trappers

REMEMBER these magnets can be very strong and trapping fingers can be a problem be careful when you are near something metal like a bridge for example