Gel versus classic manicure at home: the hygiene system matters more than the polish
The gel-versus-classic question at home is really two questions: curing and sterilisation. Gel polish hardens when photoinitiators in the formula react to specific wavelengths from an LED lamp. An underpowered or ageing lamp, or a lamp mismatched to the gel brand, leaves the lower layers undercured. Undercured gel does not just chip early; it keeps uncured monomers such as HEMA in contact with your skin and nail plate, and repeated exposure is how people develop lifelong gel allergies. A professional carries a lamp she knows matches her system and cures each layer for the full cycle, even when the client is impatient. If the lamp looks like a toy, book classic polish instead.
Sterilisation is where home visits diverge most from a fixed salon. A salon has an autoclave in the back room; a freelancer has whatever fits in the bag. The standard you can reasonably demand: metal implements arrive in sealed sterilisation pouches, ideally with the colour-change indicator visible; files and buffers are single-use or yours to keep; e-file bits are either fresh or pouch-sealed; and any soak bowl gets a disposable liner. Blue disinfectant jars are for in-session dips, not sterilisation, and a spray of alcohol over yesterday's tools does not count. Fungal and bacterial nail infections transmit exactly this way, and they are tedious to treat.