Spring is the season classical Ayurveda schedules vamana — therapeutic emesis — as the principal cleansing procedure, because Kapha is liquefied and sitting in the stomach and chest where emesis can reach it.
It is worth being clear about what that is. Vamana is a clinical procedure. It runs for days: internal oleation with medicated ghee in graded doses, external oleation and sweating, then the emetic itself under supervision, then a carefully staged return to normal food called samsarjana krama that takes about a week. It has genuine contraindications — pregnancy, heart disease, severe debility, the very young and the very old — and it is not something to attempt from an article.
So this is not an instruction to do it. It is an explanation of why the season exists, and an account of what the unsupervised version reasonably looks like.
The accessible version is langhana — lightening. Reduce quantity rather than eliminating food. Eat one clearly lighter meal a day. Drop dairy and heavy sweets for the fortnight. Warm water through the day, honey water in the morning, ginger before meals. Keep the exercise up. Take triphala at night if it agrees with you. That is genuinely most of the benefit, it has no contraindications worth the name, and nothing about it requires you to stop working.
What it is not: a juice fast. Cold sweet liquid, in Ayurvedic terms, is the single worst thing you could put into a Kapha-aggravated spring. The tradition's cleanse is dry, warm and pungent — the exact opposite of the modern one.