To a large extent it depends on how damp your surroundings are. I have no problem in Nevadas high desert but when I was a CA near the ocean, it was a constant problem. The stock contacts are unplated copper while the fuse ends are bare aluminum. So with moisture comes galvanic corrosion/oxidation and the electrons stop flowing. Decades ago the simple fix in the U.S was Busse's pointed-end GBC glass fuses. Then Busse was sold, their glass GBC fuses were discontinued and the supply of NOS fuses dried up.
Now, many change the entire fuse box to something that uses modern u-shaped ATC or ATO glass fuses with plated contacts on both the fuses and box contacts. A few extra circuits in the replacement boxes are also handy for 21st century electrical 'essentials'. Don't forget to include the two 30-amp fuses in the little supplementary box. Old 'Euro' GBC fuses are not easily found on the road if Joe Lucas continues to plague us.